Short presentation on quality assurance and improvement of OpenStreetMap for @Geomob London on 24-11-2012
Can a quality assured product increase user confidence within the "professional" community and encourage increased contribution to fill in the gaps.
Agile Testing in a tailored Kanban approachFanny Pittack
This is a story how a platform was internationalized by an international team. You will hear about Kanban, it’s adaption to our teams needs, (no-)estimates, a bit of Agile Testing, what cultural, organizational and technical challenges we faced and how we dealt with them.
Can a crowdsourced geospatial database be considered authoritative? Indeed can any dataset that describes the real world be considered authoritative, whether crowd sourced or “professionally compiled”? Who determines authority? What constitutes authority in geodata? Does authority matter and if it does, why? What actions or processes might contribute to promoting crowdsourced geodata to a position of authority?
I want to consider the nature of authority in geospatial data and whether it might be possible for a crowdsourced dataset such as OpenStreetMap (although these observations could apply to any crowdsourced geodata) to become authoritative or a primary reference source.
Just because you can put something on a map ...Steven Feldman
Presentation at W3G conference in Stratford on Avon 28/09/2010
The notes to this deck are at http://www.mindmeister.com/61955413/just-because-you-can-put-something-on-a-map
Agile Testing in a tailored Kanban approachFanny Pittack
This is a story how a platform was internationalized by an international team. You will hear about Kanban, it’s adaption to our teams needs, (no-)estimates, a bit of Agile Testing, what cultural, organizational and technical challenges we faced and how we dealt with them.
Can a crowdsourced geospatial database be considered authoritative? Indeed can any dataset that describes the real world be considered authoritative, whether crowd sourced or “professionally compiled”? Who determines authority? What constitutes authority in geodata? Does authority matter and if it does, why? What actions or processes might contribute to promoting crowdsourced geodata to a position of authority?
I want to consider the nature of authority in geospatial data and whether it might be possible for a crowdsourced dataset such as OpenStreetMap (although these observations could apply to any crowdsourced geodata) to become authoritative or a primary reference source.
Just because you can put something on a map ...Steven Feldman
Presentation at W3G conference in Stratford on Avon 28/09/2010
The notes to this deck are at http://www.mindmeister.com/61955413/just-because-you-can-put-something-on-a-map
Writing Engaging Content for the Next Web and the Socializing of Information
Content-centered marketing is undergoing a transformation, one where the content is moving from:
- promotional to non-partisan - some call it thought leadership.
- highly-controlled to less-controlled - more legos than logos.
- occasional to ongoing - life stream your business.
- corporate voice to authentic, personal voice. Who should embody the voice of the company?
- one-way to conversational.The one overarching concern remains that of message consistency - and effectiveness.
How do you keep that with such a messy medium that is conversation? Learn how losing control of your content is the best thing that could happen for your business.
This presentation is divided into the following sections:
- A brief history of collaboration and sharing
- An introduction into "2.0" and consumer tools reaching into the business world
- Attention. Collaboration. Discovery.
- A quick demo of Socialtext Dashboard, Workspaces, and People
- Best practices for successful implementation and adoption of social software
- Things to look for in choosing a vendor
Mashups & Data Visualizations: The New Breed of Web ApplicationsDarlene Fichter
Web 2.0 is opening the doors to tools and toolkits for do-it-yourself (DIY) programming that requires no knowledge about programming. Find out what mashups are and how libraries are making use of them to create rich, new information services and content. Look at some of the intriguing and robust new data visualization tools, such as IBM’s alphworks, swivel, gapminder (bought by Google), etc. that can put the power of spreadsheets online for everyone in your organization to present their information as tag clouds, bar and pie charts, bubble maps, and more.
Presented by Darlene Fichter October 31, 2007 at Internet Librarian 2007
Yumpu, Single-Amplifier Biquadratic MOSFET–C Filters, analog-circuit-design-on-digital-cmos, harmonic distortion hanspeter Schmid, the-current-mode-story-hanspeter-schmid, TANNER EDA BY MENTOR GRAPHICS: FULL-FLOW TOOL SUITE FOR BOTH CUSTOM ANALOG AND
MIXED-SIGNAL DESIGNS, High-Performance Analog and RF Circuit Simulation using the Analog FastSPICE™ Platform at Columbia University, University of Twente Research Information, microelectronics-chapter-1-guc-faculty-of-information, Pure: The world’s leading Research Information Management System, Generation of complex impedance for complex filter design using fully balanced current conveyors, APPLICATIONS OF MACHINE LEARNING IN TEST COST REDUCTION AND QUALITY IMPROVEMENT Design of an advanced sEMG processor for wearable robotics applications, Wearable Multi-Biosignal Analysis Integrated Interface With Direct Sleep-Stage Classification (include teager energy operator TEO), IGI Global is a leading international academic publisher committed, Advanced Microelectronics Lab CMOS Operational Transconductors, CMOS Circuit Design, Layout, and Simulation, Research and Development of Autonomous Neuromorphic Speech Stress Detector Based on Spike Representation of Information
Link23
SGTP EdCon'10 Keynote: Future Trends & Leading TechnologiesRobert Cole
Customization, mobile, the cloud, splinternet, location, deep web, social, traveler personas, real-time and privacy are ten areas that will dictate engagement, relevance and profitability in coming years. Dramatic advancements in technology will help drive innovation and disruptive changes to operational processes. RockCheetah Founder Robert Cole covers emerging business and technology trends that will provide tremendous benefits and excruciating challenges for government travel, and the travel industry as a whole in the years ahead.
Keynote presentation held at the 15th Scandinavian International Conference on Fluid Power 2017 in Linköping, Sweden
It covers the topics energy efficiency, electromobility, operator assistance, automation, connectivity and site solutions.
Short presentation to Arup on how consumer mobile applications might influence the design and uptake of mobile workflows within the enterprise.
The secret sauce is context (location, direction, time and schedule)
UK Government is consulting on Principles of Open Data, opportunities and challenges as well as charging and licensing for Public Data Corporation.
A brief summary of the key topics to facilitate discussion
2010 was a big year for the Open Data community, some Ordnance Survey data was made freely available, data.gov.uk launched with a raft of data from across government, government published an open data license and then a new government took over who seem to be equally committed to Open Data. So far we have seen Local Government brought into the Open Data initiative (albeit with a bit of a struggle) and most recently aggregated crime data has been published on police.uk.
- So is everything rosy in the Open Data garden or are there dark clouds looming on the horizon?
- In a geo-context it seems that if we can pin a pair of coordinates to something someone will put it on a map, perhaps we need to pause before we map?
- Is Open Data the same as openness and transparency in a government context?
- What kind of accountability will access to Open Data deliver?
A lecture that I gave on 17th March 2010 at the University of Nottingham on the History of Web Mapping.
Starts with some early history and then tracks the interplay of technology, business and usage in the development of web mapping over the last 2 decades.
Based on a series of interviews with key players in the UK and US, this is a work in progress. There is still quite a lot more needed to complete this.
Some useful resources are linked to in the penultimate slide. The mind map that I used to build this talk is at http://bit.ly/HistoryWebMap
Writing Engaging Content for the Next Web and the Socializing of Information
Content-centered marketing is undergoing a transformation, one where the content is moving from:
- promotional to non-partisan - some call it thought leadership.
- highly-controlled to less-controlled - more legos than logos.
- occasional to ongoing - life stream your business.
- corporate voice to authentic, personal voice. Who should embody the voice of the company?
- one-way to conversational.The one overarching concern remains that of message consistency - and effectiveness.
How do you keep that with such a messy medium that is conversation? Learn how losing control of your content is the best thing that could happen for your business.
This presentation is divided into the following sections:
- A brief history of collaboration and sharing
- An introduction into "2.0" and consumer tools reaching into the business world
- Attention. Collaboration. Discovery.
- A quick demo of Socialtext Dashboard, Workspaces, and People
- Best practices for successful implementation and adoption of social software
- Things to look for in choosing a vendor
Mashups & Data Visualizations: The New Breed of Web ApplicationsDarlene Fichter
Web 2.0 is opening the doors to tools and toolkits for do-it-yourself (DIY) programming that requires no knowledge about programming. Find out what mashups are and how libraries are making use of them to create rich, new information services and content. Look at some of the intriguing and robust new data visualization tools, such as IBM’s alphworks, swivel, gapminder (bought by Google), etc. that can put the power of spreadsheets online for everyone in your organization to present their information as tag clouds, bar and pie charts, bubble maps, and more.
Presented by Darlene Fichter October 31, 2007 at Internet Librarian 2007
Yumpu, Single-Amplifier Biquadratic MOSFET–C Filters, analog-circuit-design-on-digital-cmos, harmonic distortion hanspeter Schmid, the-current-mode-story-hanspeter-schmid, TANNER EDA BY MENTOR GRAPHICS: FULL-FLOW TOOL SUITE FOR BOTH CUSTOM ANALOG AND
MIXED-SIGNAL DESIGNS, High-Performance Analog and RF Circuit Simulation using the Analog FastSPICE™ Platform at Columbia University, University of Twente Research Information, microelectronics-chapter-1-guc-faculty-of-information, Pure: The world’s leading Research Information Management System, Generation of complex impedance for complex filter design using fully balanced current conveyors, APPLICATIONS OF MACHINE LEARNING IN TEST COST REDUCTION AND QUALITY IMPROVEMENT Design of an advanced sEMG processor for wearable robotics applications, Wearable Multi-Biosignal Analysis Integrated Interface With Direct Sleep-Stage Classification (include teager energy operator TEO), IGI Global is a leading international academic publisher committed, Advanced Microelectronics Lab CMOS Operational Transconductors, CMOS Circuit Design, Layout, and Simulation, Research and Development of Autonomous Neuromorphic Speech Stress Detector Based on Spike Representation of Information
Link23
SGTP EdCon'10 Keynote: Future Trends & Leading TechnologiesRobert Cole
Customization, mobile, the cloud, splinternet, location, deep web, social, traveler personas, real-time and privacy are ten areas that will dictate engagement, relevance and profitability in coming years. Dramatic advancements in technology will help drive innovation and disruptive changes to operational processes. RockCheetah Founder Robert Cole covers emerging business and technology trends that will provide tremendous benefits and excruciating challenges for government travel, and the travel industry as a whole in the years ahead.
Keynote presentation held at the 15th Scandinavian International Conference on Fluid Power 2017 in Linköping, Sweden
It covers the topics energy efficiency, electromobility, operator assistance, automation, connectivity and site solutions.
Short presentation to Arup on how consumer mobile applications might influence the design and uptake of mobile workflows within the enterprise.
The secret sauce is context (location, direction, time and schedule)
UK Government is consulting on Principles of Open Data, opportunities and challenges as well as charging and licensing for Public Data Corporation.
A brief summary of the key topics to facilitate discussion
2010 was a big year for the Open Data community, some Ordnance Survey data was made freely available, data.gov.uk launched with a raft of data from across government, government published an open data license and then a new government took over who seem to be equally committed to Open Data. So far we have seen Local Government brought into the Open Data initiative (albeit with a bit of a struggle) and most recently aggregated crime data has been published on police.uk.
- So is everything rosy in the Open Data garden or are there dark clouds looming on the horizon?
- In a geo-context it seems that if we can pin a pair of coordinates to something someone will put it on a map, perhaps we need to pause before we map?
- Is Open Data the same as openness and transparency in a government context?
- What kind of accountability will access to Open Data deliver?
A lecture that I gave on 17th March 2010 at the University of Nottingham on the History of Web Mapping.
Starts with some early history and then tracks the interplay of technology, business and usage in the development of web mapping over the last 2 decades.
Based on a series of interviews with key players in the UK and US, this is a work in progress. There is still quite a lot more needed to complete this.
Some useful resources are linked to in the penultimate slide. The mind map that I used to build this talk is at http://bit.ly/HistoryWebMap
Cocktails on the Titanic - AGI GeoCommunity '10Steven Feldman
Presentation at GeoCommunity in Stratford on Avon 29/09/2010
Mindmap with some notes is at http://www.mindmeister.com/61496552/cocktails-on-the-titanic
A short presentation to the Society for Location Analysis in London, 15/7/2010
The mindmap which contains the key points and storyline for the presentation (which you can edit) is at http://www.mindmeister.com/maps/public_map_shell/56029374/the-cloud-the-crowd-the-iphone
A presentation and intro to a panel session on day 1 of State of the Map in Girona. Leads into an elevator pitch from 5 startups (winner was GeoFabrik)
Just pretty pictures really, you had to be there to get the drift of the session
Presentation at Exor Knowledge Days, 2010
Realising the benefits of mobile working in highways maintenance requires process changes more than technology. This presentation explores some of the challenges and opportunities.
More on Exor at http://www.exorcorp.com
Without a business model we are all FCUK'dSteven Feldman
A few things you might want to ask yourself before you pack in the day job to build your startup.
* Who are my customers?
* What are they buying from me?
* How much will they pay? How much will it cost me to supply them and how many might buy?
* Why will they buy from me and not someone else?
If you can't answer WWHW in 1 minute perhaps you should re-evaluate your business model.
Is Volunteered Geographic Information sustainable?
What is a sustainable map?
Why do people contribute to open projects and in particular OpenStreetMap?
How can OSM build and sustain its community?
Location Based Social Networks - Killer App or Blind Alley?Steven Feldman
Luke Razzell and I ran this as a guided discussion at the British Computer Society on 5th March 2009. Then I tried to run through it in 6 minutes at Mashup* Events Being Location Aware on 19th March 2009
How to Create Map Views in the Odoo 17 ERPCeline George
The map views are useful for providing a geographical representation of data. They allow users to visualize and analyze the data in a more intuitive manner.
Power-sharing Class 10 is a vital aspect of democratic governance. It refers to the distribution of power among different organs of government, levels of government, and social groups. This ensures that no single entity can control all aspects of governance, promoting stability and unity in a diverse society.
For more information, visit-www.vavaclasses.com
Solid waste management & Types of Basic civil Engineering notes by DJ Sir.pptxDenish Jangid
Solid waste management & Types of Basic civil Engineering notes by DJ Sir
Types of SWM
Liquid wastes
Gaseous wastes
Solid wastes.
CLASSIFICATION OF SOLID WASTE:
Based on their sources of origin
Based on physical nature
SYSTEMS FOR SOLID WASTE MANAGEMENT:
METHODS FOR DISPOSAL OF THE SOLID WASTE:
OPEN DUMPS:
LANDFILLS:
Sanitary landfills
COMPOSTING
Different stages of composting
VERMICOMPOSTING:
Vermicomposting process:
Encapsulation:
Incineration
MANAGEMENT OF SOLID WASTE:
Refuse
Reuse
Recycle
Reduce
FACTORS AFFECTING SOLID WASTE MANAGEMENT:
We all have good and bad thoughts from time to time and situation to situation. We are bombarded daily with spiraling thoughts(both negative and positive) creating all-consuming feel , making us difficult to manage with associated suffering. Good thoughts are like our Mob Signal (Positive thought) amidst noise(negative thought) in the atmosphere. Negative thoughts like noise outweigh positive thoughts. These thoughts often create unwanted confusion, trouble, stress and frustration in our mind as well as chaos in our physical world. Negative thoughts are also known as “distorted thinking”.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
The Indian economy is classified into different sectors to simplify the analysis and understanding of economic activities. For Class 10, it's essential to grasp the sectors of the Indian economy, understand their characteristics, and recognize their importance. This guide will provide detailed notes on the Sectors of the Indian Economy Class 10, using specific long-tail keywords to enhance comprehension.
For more information, visit-www.vavaclasses.com
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
Palestine last event orientationfvgnh .pptxRaedMohamed3
An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
3. Whose Authority?
able to be trusted as being accurate or true; reliable:
“clear, authoritative information and advice”
“an authoritative source”
(of a text) considered to be the best of its kind and unlikely
to be improved upon:
“this is likely to become the authoritative study of the
subject”
commanding and self-confident; likely to be respected
and obeyed:
“his voice was calm and authoritative”
proceeding from an official source and requiring
compliance or obedience:
“authoritative directives”
http://www.flickr.com/photos/spunter/2907888414/
9. How accurate is OSM in GB?
No formal
and
consistent QA
processes
applied!
10. the analysis of
Muki says …
OSM shows In 2010 coverage
that deprived atat 69.8%
69.8% but
communities attribution 24.3%
and rural areas
are not well
covered,
especially when
attributes are
considered
http://www.flickr.com/photos/chrisfleming/5942012099/
11. Could OSM be an
authoritative source for GB?
http://www.flickr.com/photos/thorinside/194806347/
13. Tile OSM-GB WMS
Service
Projected
WFS
to OSGB
Rules based
Data available for quality
download/reuse improved
on OSM terms
14. A step through the OSM-GB
Download
Data
workflow WMS
WFS
Tile Svc
OSM Master OSM-GB Raw OSM-GB
Database Database QA/QI DB
?
OSM-GB QA 1Spatial
Report for Quality Rules Rules based
potential Engine improvement actions
action
15. Someautomated rules based processes
Will Research Questions
improve quality?
Will formal QA increase
confidence/authority?
How can improved QA & confidence
increase contribution?
Can “professional” contributors be
“motivated” to fill in gaps?
Are there use cases that will support a
sustainable commercial model for
OSM-GB?
16. There is no one to blame
http://www.flickr.com/photos/a2gemma/1448178195/
17. Can the crowd be
authoritative?
Yes and No
http://www.flickr.com/photos/wallyg/160534588/
18. A final thought
Maps don’tmatter? be
Does it have to
authoritative, they can just
be fun and useful
Martin Usborne http://londonist.com
19. Thank You
www.osmgb.org.uk
www.knowhwerconsulting.co.uk
Editor's Notes
Note the emphasis on “how”Can a crowdsourced geospatial database be considered authoritative? Indeed can any dataset that describes the real world be considered authoritative, whether crowd sourced or “professionally compiled”? Who determines authority? What constitutes authority in geodata? Does authority matter and if it does, why? What actions or processes might contribute to promoting crowdsourced geodata to a position of authority?I want to consider the nature of authority in geospatial data and whether it might be possible for a crowdsourced dataset such as OpenStreetMap (although these observations could apply to any crowdsourced geodata) to become authoritative or a primary reference source. These are some early musings on the topic, more to followI also want to introduce you to a new project called OSM-GB which might make a contribution to increasing the coverage and authority of OpenStreetMap for GB users.
If you are impatient let me give you the executive summary:In a literal sense a crowdsourced dataset is unlikely to ever be granted legal status as authoritative (e.g. for conveyancing) but that does not mean that it cannot attain a level of acceptance that is close to authoritative and may in practice be more accurate/complete/up to date than data that has a formal stamp of authority
Defining AuthorityLet me start by considering what authority means in terms of a geodata.The Oxford English Dictionary, which in itself would be considered an authority on the English language, defines “authoritative” asCLICK1 able to be trusted as being accurate or true; reliable: CLICK2 commanding and self-confident; likely to be respected and obeyed:Several different concepts are merged in these definitions: accurate, true and reliable all seem to have an absolute quality while best of its kind and unlikely or likely are relative terms. There are also differing ways that authority can be manifested: reliable, commanding and self-confident - does a dataset become authoritative if I assert its authority with self confidence? Perhaps the different aspects of the definition highlight the challenge of determining what constitutes authority in a geodata, is it absolute or relative, is authority granted, assumed or objectively defined?
Let’s look at some geodata and consider what we think about that data in terms of authorityCLICK – this OS OpenData, authoritative but not very detailed (of course there is much more detail available if you pay)CLICK – This is Google, more detail and some nice buildingCLICK – OSM – much more detail and attribution, but is it accurate can we trust it?Let’s look at the 3 main criteria that we would want to assess data against in terms of authority
In the context of authoritative geodata I suggest that we would expect it to be Geometrically and positionally accurate (within the scale/specification of capture)
Complete, no features or objects within the scope of the dataset are omittedOS has an SLA to capture 99.6% of real world change within 6 months
Correctly attributed (features are correctly named and classified according to a pre-determined but inevitably evolving scheme or taxonomy)
Authority is more than accuracyAccuracy alone does not guarantee authorityAccuracy and completeness are not the sole determinants of authority, change detection, capture standards and processes and quality assurance processes will all impact our willingness to “trust” or “respect” a dataset.Authority implies having some visible quality specifications and processes for testing the data against those specsIt is important to distinguish between data that has authority and data that is “accurate” or deemed to be fit for purpose the latter may be good enough or even very good but still may not have the implied safety/reliability seal that comes with being classed as authoritative. The opposite could also be true, it is also possible that data that has some official seal of authority may not be accurate, complete and current.
We have seen that authority is about trust and respect in addition to accuracy and we know that even OS is not perfect so what other data might gain our trust and respect?Let’s turn our attention to OSMIs it possible for a crowdsourced dataset such as OSM to be “trusted as being accurate or true” or “considered to be the best of its kind and unlikely to be improved upon”? Let’s consider the 3 criteria for authoritative geodata outlined above.The challenges1. Geometrically and positionally accurateOSM data is captured by a combination of handheld GPS surveys and “armchair surveys” tracing over aerial imagery donated by Yahoo or Bing (more up to date), in principle it should be possible to capture data to about 5m accuracy or slightly better using these tools. Whether this is sufficient to be relied upon will depend upon the proposed use of the data.2. Complete, no features or objects within the scope of the dataset are omittedThe community based approach to data capture does not allow for volunteers to be directed to cover specific areas in a planned manner although over time it does appear that the completeness is improving. A lack of completeness will limit the use of the data in applications which require broad cover, however that might not be a concern to an organisation wishing to build an application for say Greater London only. 3. Correctly attributed and classifiedAttribution and classification are more dependent on “on the ground” observations than the other criteria above. Consequently the level of attribution and classification has lagged behind the simple capture of geometry. Furthermore the classification model within OSM known as tags can be confusing for new contributors resulting in some potential errors or omissions in classification.Click But there are no formal QA processes, does that mean we cannot trust OSM?
MukiHaklay has undertaken several quantitative studies of the accuracy and completeness of OSM data which suggest that the data that has been captured is accurate but not yet complete or fully attributed. “By the end of March 2010, OpenStreetMap coverage of England grown to 69.8% from 51.2% a year ago. CLICK When attribute information is taken into account, the coverage grown to 24.3% from 14.7% a year ago.”CLICKAlthough there is a continually improving trend in completeness and attribution it would appear that the demographics and geographic distribution of volunteers may prevent the map ever having full or even close to full attribution and GB cover.See Haklay, M., 2010, “How good is volunteered geographical information? A comparative study of OpenStreetMap and Ordnance Survey datasets” at http://povesham.wordpress.com/2010/08/03/how-good-is-vgi-a-comparative-study-of-openstreetmap-and-ordnance-survey-datasets-published/See Haklay at http://povesham.wordpress.com/2010/04/04/openstreetmap-completeness-evaluation-march-2010/
This question needs to be considered within the context of the constraints of an informal organisation of volunteer contributors. To become a reliable and trusted source of information within GB, OSM would need to broaden the range of contributors and identify the means to motivate contributors to focus on completing the map to a consistent level for the whole of the GB. It is unclear whether this is something that the current mapping community is able to achieve let alone wishes to doAccuracy and attributionThere are a wide range of quality evaluation tools and services developed by the OSM community for bug reporting, error detection, monitoring, and analysing tags. Specific tools range from checking network continuity, analysing relationships, visualising turn restrictions and identifying duplicate nodes, there are also tools to mark potential errors, analyse data by contributor and many that are country specific. However there is no mandatory set of processes that data pass through prior to release and it is difficult to determine the extent to which these tools are used by volunteers.The OSM philosophy on quality can perhaps be summarised as “the wisdom of the crowd will ultimately correct any errors or omissions” whether that is through observation or through the use of the tools available.If a combination of automated QA tools were applied in a consistent process to OSM edits then potential errors could be flagged and in some way prioritised for further examination and either corrected or verified.CompletenessMukiHaklay has identified that the level of completeness of OSM is greater in urban areas and that it also inversely correlates with the level of deprivation within an area.“… the analysis of OSM shows is that deprived communities and rural areas are not well covered, especially when attributes are considered”To rectify these biases OSM would need to find ways to either encourage existing volunteer contributors to step outside of their current areas of activity or attract new contributors in these under-mapped areas.See http://wiki.openstreetmap.org/wiki/List_of_OSM_based_Services#Quality_Assurance and http://wiki.openstreetmap.org/wiki/Quality_AssuranceSee Haklay & Ellul “Completeness in volunteered geographical information”
Users as producers – explain the shift from producer centric communityThere is no formal mission statement or outline of quality and coverage objectives for OSM, however this description on the OpenStreetMap Foundation’s web site probably is as close as we will get OpenStreetMap is an open initiative to create and provide free geographic data such as street maps to anyone who wants them. It is a massive online collaboration, with hundreds of thousands of registered users worldwide.It is focussed on producing maps that are available without charge or constraint and interestingly refers to its contributors as “users” rather than producers. I would say that it is producer centric not user centricThe direction of OSM is largely driven by an active community of volunteers who have taken on the mission to map the world for a variety of reasons which range from producer centric “because we can” or “because it is fun” to more commercial or humanitarian motivations. The organisation has been highly producer centric and has, up till now, resisted the influence of large potential users of its data (corporates or governments). A recent blog post by Martijn van Exel makes the case for OSM to focus on “warm” geography rather than seeking to emulate what he describes as the “cold” geography of national mapping agencies and navigation data suppliers.“… the extremely high churn rate that OpenStreetMap is coping with — less than one tenth of everyone who ever created an OpenStreetMap account continue to become active contributors. ..OpenStreetMap needs those flesh and blood contributors, because it is ‘Warm Geography’ at its core: real people mapping what is important to them — as opposed to the ‘Cold Geography’ of the thematic geodata churned out by the national mapping agencies and commercial street data providers; data that is governed by volumes of specifications and elaborate QA rules.”This is one contributor’s view but in my opinion it will resonate with many current contributors. If the current contributors do not want to create data that conforms to a specification then OSM is unlikely to become a trusted and reliable source of geodata.Perhaps by attracting potential users of OSM who are concerned with that “cold” geography to become contributors, the challenges of a consistent approach to QA and a more structured approach to completeness can be resolved. OSM-GB is one possible way of attracting such users.http://blog.osmfoundation.org/faq/http://oegeo.wordpress.com/2011/08/30/openstreetmap-and-warm-vs-cold-geography-2/
OSM-GB is a project being initiated at the Centre for Geospatial Sciences at Nottingham University. It is a collaboration between CGS and 1Spatial that will apply 1Spatial’s rules based geodata quality tools to a GB extract of OSM. The resulting “improved” and structured data will be projected into BNG and served as an OGC Web Map Service and Web Feature Service, for the duration of this project (approximately 15 months) these services will be available at no charge.
The project has 2 main strands of research:Applying rules based quality improvement processes to OSM to identify possible errors and after some experiment and refining of the rules potentially to automatically correct some geometric and attribute errors. The “improved” dataset will be available for download from the OSM-GB web site and could be offered back to the main OSM database (probably as a basis for further inspection prior to incorporation).By making the “improved” data available via standards based web services, it is hoped that public sector users in both central and local government will be encouraged to experiment with OSM and identify potential use cases for OSM that are not met by the geodata currently available through the PSMA. A number of organisations have already confirmed interest in accessing OSM-GB.The objective of making data available to so called professional users whose expectations have been set by using authoritative geodata is to encourage them to become contributors to OSM, motivated by the potential use cases identified, the flexibility of the range of data that can be captured and the data model. These users will often have a great deal of local knowledge (particularly those working within local government) that could help to address the challenges of completeness detailed above. In the longer term it may even be possible to encourage these users to incorporate contributing to OSM as part of their routine workflows.
Blame – 1 of the most frequently leveled criticisms at OSMResponsibility for the quality of OSM is often raised as a concern by potential users (much less so by people actually using the data) “who would I blame if something goes wrong?” The answer inevitably is no one, however it should be noted that most data providers including OS do not warrant that their data is accurate or even fit for purpose and exclude any liability for errors. CLICK For example the PSMA says:9.4 Ordnance Survey excludes to the fullest extent permissible by law all warranties, conditions, representations or terms, whether implied by, or expressed in, common law or statute including, but not limited to, any regarding the accuracy, compatibility, fitness for purpose, performance, satisfactory quality or use of the Licensed Data.
Wrapping upOSM is unlikely to ever be considered authoritative within a legal context. CLICKBut I hope that I have shown how in the more conversational sense of the term authoritative, OSM data could become an alternative trusted and reliable source of geodata for “professional users” offering a wide range of content which differs from and complements other sources. For this level of trust to be achieved a more formal approach to quality assurance and a more structured and consistent approach to data capture (content, geography and attribution) will be needed. The current OSM contributors may not choose to move in this direction but projects like OSM-GB may attract a new group of user/contributors who recognise the opportunities that OSM offers them and their organisations and who are able to help improve quality and extend coverage and attribution.
Informal mapping can communicate a lot of local knowledge without being accurateClickDoes it really matterSo rememberCLICK
Rules based quality improvement combined with OpenStreetMap could produce a trusted dataset that encourages users to become contributors – a winning team!Don’t forget to look at osmgb.org.uk