Slides used in an EDINA webinar on 6 March 2013, covering the Marine Digimap service. The service offers view and download functions for Admiralty Charts of the UK and surrounding seas, plus Hydrospatial vector mapping data.

1. Content
 What is Marine Digimap?
 What can I do with Marine Digimap?
 Marine Roam
 Marine Maps
 Hydrospatial Data Download
 Charted Raster Download

2. What is Marine Digimap?
• Online service, one
of Digimap
Collections of
geospatial data
• Subscription
service, user
registration
required
• SeaZone Solutions
data, licensed by
JISC for use in
education
• 2 datasets are used
in the service,
Hydrospatial and
Charted Raster

3. Content
 What is Marine Digimap?
 What can I do with Marine Digimap?
 Marine Roam
 Marine Maps
 Hydrospatial Data Download
 Charted Raster Download

4. What can I do with Marine Digimap?
View maps online,
print/download PDF,
A3, A4
Download 2 types of
Marine digital map
data
• Charter Raster data
• Hydrospatial data

5. Charted Raster Data
• Raster data product, used to create online maps in Marine Maps within
Marine Digimap.
• Scanned Admiralty Charts covering the UK and the surrounding seas from
1:3.5million to 1:2,500.
• Data supplied as GeoTiff images, ready for use in a GIS.
• Each map has its own projection, referenced to WGS84. Not British
National Grid.
• These data make ideal backdrop maps, but must NOT be used for
navigation. Current Admiralty Charts can be purchased from the UK
Hydrographic Office.
• Last update to data in Marine Digimap in 2005.

6. Charted Raster data
• Marine Maps facility
• Search Charted Raster
Maps
• Grouped into 6 scale
bands; ocean, sea,
general, coastal,
approaches and
harbour (roughly
equivalent to the
usage bands of
Admiralty Charts).

7. Data in Digimap – 2 types

8. Hydrospatial Data
• Vector data product from SeaZone, designed for use in a GIS:
http://www.seazone.com/dataHydroSpatial.php
• Used to create online maps in Marine Roam, within Marine Digimap.
• 7 Topic Layers – each layer has themes:
–Bathymetry and Elevation
–Socio-Economic and Marine Use
–Conservation and Environment
–Structures and Obstructions (themes include Navigation Aides, Obstructions, Offshore
Installations, Shoreline Constructions and Wrecks)
–Climate and Oceanography
–Natural and Physical Features
–Metafeatures and Cartography
• Data is collected at various scales, the best available for each source.
• Projected in WGS84 not British National Grid.
• Available in 2 formats - Shapefile (for ArcGIS), MapInfo Tab.
• Last updated in Marine Digimap in 2011.

9. Hydrospatial Data

10. Hydrospatial Data

11. Content
 What is Marine Digimap?
 What can I do with Marine Digimap?
 Marine Roam
 Marine Maps
 Hydrospatial Data Download
 Charted Raster Download

12. Marine Roam
Task Menu: search,
custom view, map
info., save
Tools: measure,
annotate,
identify
features, print,
navigation

13. Views
• Online maps, uses Hydrospatial data
• Print/download A3/A4 PDF maps
• 13 fixed scales, ranging from 1:2500 to 1:5,000,000
• Zoom in and out of different scales
• Not all details from Hydrospatial data can be viewed at
each scale
• Default view or ‘Basemap content view’ – contains a
selection of layers from the data appropriate for that
scale
• Select layers of your choice for ‘Customised content view’
– in Map Content Control

14. Search options

15. Basemap Content View

16. Navigate
• Zoom in – double click or use scroll wheel
• Click on scale bar to zoom in/out
• Click and drag on map to move around
• Or use compass to move NSEW

17. Overview Map
• Click and drag red box to
reposition your map
location

18. Map Content Control
• Check the boxes next
to the topics and
layers you wish to
display
• Map updates
automatically

19. Map Content Control
• Basemap Content
View shows a
selection of features
from the
Hydrospatial data,
appropriate to the
scale of your map
view
• Add/remove any
features from the
display >
Customised Content
View

20. Basemap Content View

21. Customised Content View

22. Customised Content View

23. Map Information
• Displays:
– coordinates of
current map,
– print scale, and
– cursor coordinates

24. MyMaps
• Save up to 200
maps within
MyMaps
• Click any entry in
the list to
regenerate that
map

25. Measurement tools

26. Measurement tools

27. Annotation tools
• Add markers, shapes, labels, measurements
• Save, display in any Digimap Roam application
• Export
• import

28. Annotation tools

29. Export annotations
• You can export your
annotations, to use
in GIS or other
applications

30. Import annotations
• You can import spatial datasets
into any Roam application to
view those features as
annotations. This could be a
dataset you have created in a
GIS, downloaded from Digimap
or another data provider, tracks
or points surveyed using a GPS
unit or a geocoded table of
survey results.
• You can import Shapefiles, KML,
GPX, CSV and GeoJSON
datasets.
• In this example we uploaded a
zip file, which contained a
Shapefile (and other associated
files)
• Location of operational
windfarms in GB

31. Feature Info.
• Click then on your selected feature on the map
• Marker placed where you click

32. Print
• If you have all layers selected (in the Map Content Control area),
likely to receive an error message.
• De-select some layers and try again.

33. Print
• Reposition map by clicking and dragging preview map.
• Set title, grid lines, annotations options.
• Select portrait/landscape, A3/A4.
• Click Generate Print File.

34. PDF print

35. Content
 What is Marine Digimap?
 What can I do with Marine Digimap?
 Marine Roam
 Marine Maps
 Hydrospatial Data Download
 Charted Raster Download

36. Marine Maps
• Online map creation, uses scanned Admiralty Chart images (Charted
Raster data)
• Print/download A4 maps
• The maps are grouped into 6 scale bands; ocean, sea, general, coastal,
approaches and harbour (roughly equivalent to the usage bands of
Admiralty Charts).
• Each scale band features a different set of Admiralty Charts, with
features most relevant to the scale. The scanned images are used to
build up a mosaic of maps for each scale band.
• Scales vary from 1:3.5million to 1:2,500.
• These make ideal backdrop maps, but must NOT be used for navigation.

37. Scale/Usage bands
• Ocean - small scale ( 1:3,500,000 to 1:750,000)
• Sea - small scale (> 1:750,000 to 1:300,000)
• General - small to mid scale (1:200,000 to 1:100,000)
• Coastal - mid scale ( 1:100,000 to 1:50,000)
• Approaches - mid to large scale ( 1:50,000 to 1:15,000)
• Harbour - large scale ( 1:25,000 to 1:2,500)

38. Marine Maps
• Source maps may
be at different
scales.
• In Marine Maps,
maps of different
source scales are
viewed at same
scale…so you may
find some
differences in detail
in adjacent areas.

39. Opening screen

40. Marine Maps home page
• Use the drop down menu to
view areas covered by different
usage bands.
• To search, enter details in a
search box or click on the map
to go to your area of interest.

41. Different map views
• Switch views by clicking on
the icons above the map
• Zoom in and out of that
view, using the bar to the
left of the map

42. Legend
• The legend shows the more
commonly found symbols on
Marine Maps
• More detailed information
available from the Marine
Lexicon

43. Map Chest
• Maps can be saved in Map
Chest
• Unique to each user
• Maps erased after 5 days
• Print from Map Chest as:
– PNG format, A4

44. Content
 What is Marine Digimap?
 What can I do with Marine Digimap?
 Marine Roam
 Marine Maps
 Hydrospatial Data Download
 Charted Raster Download

45. Hydrospatial Download
Hydrospatial download process:
• Identify product / format
• Search for your location
• Select the required data
• Make download settings
• Download data

46. Step 1: select product/format

47. Step 4: Choose data

48. Data layer selection
• Each product has layers of detail.
• Depending on the area selected for
download, they may not all be
available.
• Example:
– Structures and Obstructions
• Navigation Aides
• Obstructions
• Offshore Installations
• Shoreline Constructions
• Wrecks

49. Onward use of data in ArcGIS
Hydrospatial data:
• Older versions of ArcGIS not supported. Can’t guarantee data will work in
ArcView 3.x
• Shape files, no need to convert
• All of the files provided with Shape files must be kept in the same folder
• To view data as it is seen in Marine Digimap, need to download and install 2
folders with cartographic styles and apply these:
– fonts.zip
– style.zip
• Folders and information on applying styles available in Help > Using
data with ArcGIS

50. Content
 What is Marine Digimap?
 What can I do with Marine Digimap?
 Marine Roam
 Marine Maps
 Hydrospatial Data Download
 Charted Raster Download

51. Charted Raster Download – 4 step process

52. Step 1: Search
1. Select the Scale bands of interest
– use the coverage map to see which bands are available for your area
– bands deselected can be added back in when choosing maps
1. Search using one of the options (Select your location from the list of
results, if applicable)

53. Step 3: Choose data
• Choose the maps
you want from the
list or click on the
map
• Zoom in and out to
see larger or smaller
maps in the area
• Click Continue
• Next step is to
order, then
download data in
zip file

54. Download
• Check order
• Agree ‘aware
not to be used
for
navigational
purposes’
• Click Extract
data

55. Download
• Click Data.zip file
• Save File

56. What do I download?
• Unzip the folder
from Marine
Digimap to access
the data

57. Download folder contents
• TIFF image is your map
• TIFF image has georeferencing encoded within it
• GIS software will know where to place your map