MapWarper O'Reilly Ignite Talk, Where2.0 about crowd sourced open source map geo rectifier

1. Tim Waters
thinkwhere.wordpress.com
tim@geothings.net @tim_waters
Leeds, UK
Map Warper
mapwarper.net
georectify / georeference / warp / stretch

2. Wt?
2 examples

3. Yahoo map mixer
Microsoft map cruncher
Metacarta map rectifier
Desktop GIS solutions

4. Free
Open Source
For people who love maps
OpenStreetMap Project
http://svn2.geothings.net/mapwarper/

5. Thanks Mikel
Thanks John

7. Map List of types of maps
Upload a new map

8. Warp map
Error

9. GDAL
Gdalwarp
Gdal_translate
gdal_translate ­a_srs '+init=epsg:4326' ­of VRT
gdal_translate
/home/tim/work/warper/mapwarper/public/mapimages/src/orig6985.tif
/home/tim/work/warper/mapwarper/public/mapimages/dst/28_temp.vrt
­gcp 1100.2, 2332.0, ­83.9654296874, 41.8320690697 ­gcp 3782.0, 1676.12,
­78.9996093751, 42.710039226 ­gcp 2703.45, 3760.35, ­81.196875, 40.675794242
gdalwarp ­rn ­dstalpha
/home/tim/work/warper/mapwarper/public/mapimages/dst/28_temp.vrt
/home/tim/work/warper/mapwarper/public/mapimages/dst/28.tif ­co TILED=YES

10. Output
crop

11. Whooms – upload geotiff, serve as wms
http://github.com/timwaters/whooms/tree/master
get '/wms' do
@map = params["layer"]
ows = Mapscript::OWSRequest.new
ok_params = Hash.new
params.each {|k,v| ok_params[k.upcase] = v }
[:request, :version, :transparency, :service, :srs, :width, :height,
:bbox, :format, :srs].each do |key|
ows.setParameter(key.to_s, ok_params[key.to_s.upcase]) unless
ok_params[key.to_s.upcase].nil?
end
ows.setParameter("STYLES", "")
ows.setParameter("LAYERS", "image")
ows.setParameter("COVERAGE", "image")
mapsv = Mapscript::MapObj.new(File.join(map_directory, '/wms.map'))
mapsv.applyConfigOptions
mapsv.setMetaData("wms_onlineresource", "http://" + request.host +
"/wms/#{@map}")
raster = Mapscript::LayerObj.new(mapsv)
raster.name = "image"
raster.type = Mapscript::MS_LAYER_RASTER;
raster.data = File.join(map_directory, @map)
raster.status = Mapscript::MS_ON
raster.dump = Mapscript::MS_TRUE
raster.metadata.set('wcs_formats', 'GEOTIFF')
raster.metadata.set('wms_title', ("wms from whooms "+@map))
raster.metadata.set('wms_srs', 'EPSG:4326')
raster.debug= Mapscript::MS_TRUE
Mapscript::msIO_installStdoutToBuffer
result = mapsv.OWSDispatch(ows)
content_type = Mapscript::msIO_stripStdoutBufferContentType || "text/plain"
result_data = Mapscript::msIO_getStdoutBufferBytes
send_data result_data, :type => content_type, :disposition => "inline"
Mapscript::msIO_resetHandlers
end

12. Layers
Mosaic

13. GDAL
Tileindex
gdaltindex
gdaltindex ­write_absolute_path /home/tim/work/warper/mapwarper/db/maptileindex/7.shp
/home/tim/work/warper/mapwarper/public/mapimages/dst/91.tif
/home/tim/work/warper/mapwarper/public/mapimages/dst/41.tif

14. Export options

17. Crowd sourced
but you can be
private if you like

18. The OpenStreetMap Project
WMS

19. Applications – obvious to work with map libraries and digital collections.

22. Licences and Terms
Google maps vs Google Satellite
Derivative works through using Ordnance Survey maps to rectify – anti pattern Councils

23. Free our Old Maps!
Open Historical Map
Project
Lets build up a database
for the past!

24. @tim_waters
tim@geothings.net
http://mapwarper.net
http://svn2.geothings.net/mapwarper/