David Lovelace - Analysing, displaying and sharing historic landscapes from field survey and archive maps using QGIS, OpenLayers and Geoserver

9. www.h2om.uk

11. 1947 RAF air photo

12. Geo-referencing the 1947 RAF air photo
Base layer layer to be transformed
Find reference points

13. Control point error

14. Both control points correct

23. Ockley Wood
Barnet Wood
N

24. N

25. 1840 Wigmore tithe map

29. 1840 Wigmore Tithe Map
Woodwood formerly a
‘common wood’ in Deerfold
Forest, enclosed in 1828

30. George V opens the Elan Valley reservoirs

36. Digitising the Elan estate maps before transfer to the Museum of Wales

37. Each map required 30 to 50 photos, linearly
stitched to recreate the map at high resolution

41. The 27 maps covering 50,000 acres to stitched and georeferenced
converted to ecw served via OL3 from Geoserver – try this (fingers crossed)
www.r5r.eu/melica/index_elan.html

42. The 27 maps covering 50,000 acres to stitched and georeferenced
converted to ecw served via OL3 from Geoserver – try this (fingers crossed)
www.r5r.eu/melica/index_elan.html

43. My set up: Windows server 2008, IIS7, Tomcat 8, Geoserver 2.9.1, OL 3.14
Setting up this stack to serve ecw rasters can be a pain for reasons I’m not sure about
but I’m not alone looking at the forums..
I know ecw is a proprietary format but its convenient and effective + I’ve checked with
current owners, Intergraph, and my usage does not infringe the licence (so far).
Even when GDAL is working from the command line, the Tomcat log files will
show all is not well with Geoserver failing to see the relevant ecw libraries
And its a right old performance getting exactly the right version of GDAL, the right
version of Visual Studio its compiled with, the drivers etc. for your particular stack

44. Even when GDAL is working from the command line, the Tomcat log files will
show all is not well so Geoserver is failing to see the relevant ecw libraries
Tomcat>logs>cataline.date.log
18-Oct-2016 10:32:09.741 WARNING [http-apr-8080-exec-1]
it.geosolutions.imageio.gdalframework.GDALUtilities.loadGDAL Failed to
load the GDAL native libs. This is not a problem unless you need to use the
GDAL plugins: they won't be enabled.
WTF! Oh, thanks a bundle that’s really helpful

45. Manually restarting Tomcat seems to cure it for some reason
here’s the Tomcat log file showing everything is hunk dory.
18-Oct-2016 11:44:42.998 INFO [localhost-startStop-1]
it.geosolutions.imageio.gdalframework.GDALUtilities.loadGDAL GDAL Native
Library loaded (version: 1.9.2).
And ecw is back on the menu as a recognised data store ready to be served....

46. RAF 9” x 9”
contact print.
Norton Canon
4th
Dec 1946.
Copied using a
‘pro-sumer’
digital camera
(Sony A6300)

47. The low sun angle of this sortie reveals a
wealth of archaeological features

49. Successive frames are stitched together
using Microsoft’s free Image Composite
Editor (ICE)

50. Finally the entire parish of
Norton Canon is covered
(except for one awkward
sliver) and geo-referenced
against an already geo-
referenced 1st
edition OS
25” to mile.
Exported as ecw to the
Geoserver data store

52. www.r5r.eu/melica/index_nc.html

53. Web page files in folder on the server:

57. I’ve simply opened up port 8080 through the firewall on server – probably not the
best for security. Something I need to investigate.. reverse proxy?

65. Using a digital camera as a measuring and recording device

66. Diameter in image = 47 pixels

67. Import the image of tree from a
calibrated digital camera into GIS
to measure the girth of a tree

68. Malvern Hills AONB veteran tree survey

76. Whitfield Oak ring width vs date
0
1
2
3
4
5
6
7
8
9
10
1720 1740 1760 1780 1800 1820 1840 1860 1880 1900 1920 1940 1960 1980 2000
Year
Ringwidthmm
Ring width (dark red) mm
Ring x-section area (blue)
-5
0
5
10
15
20
25
30
35
40
1720 1740 1760 1780 1800 1820 1840 1860 1880 1900 1920 1940 1960 1980 2000
Year
Ringwidthmm
ringarea1000mm2