www.h2om.uk

1947 RAF air photo

Geo-referencing the 1947 RAF air photo

Base layer layer to be transformed

Find reference points

Control point error

Both control points correct

Ockley Wood

Barnet Wood

N

N

1840 Wigmore tithe map

1840 Wigmore Tithe Map

Woodwood formerly a ‘common wood’ in Deerfold Forest, enclosed in 1828

George V opens the Elan Valley reservoirs

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

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

The 27 maps covering 50,000 acres to stitched and georeferencedconverted to ecw served via OL3 from Geoserver – try this (fingers crossed)

www.r5r.eu/melica/index_elan.html

The 27 maps covering 50,000 acres to stitched and georeferencedconverted to ecw served via OL3 from Geoserver – try this (fingers crossed)

www.r5r.eu/melica/index_elan.html

My set up: Windows server 2008, IIS7, Tomcat 8, Geoserver 2.9.1, OL 3.14Setting 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

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.log18-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

Manually restarting Tomcat seems to cure it for some reasonhere’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....

RAF 9” x 9” contact print.Norton Canon4th Dec 1946.Copied using a ‘pro-sumer’ digital camera (Sony A6300)

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

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

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

www.r5r.eu/melica/index_nc.html

Web page files in folder on the server:

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?

Using a digital camera as a measuring and recording device

Diameter in image = 47 pixels

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

Malvern Hills AONB veteran tree survey

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

Rin

g w

idth

mm

Ring width (dark red) mmRing 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

Rin

g w

idth

mm

ring

are

a 10

00m

m2