GrassrootsMapping
Gulf Coast Process
- Print guides
- Gather volunteers
- Pick up helium
- Pick up equipment from LABB - 4226 Canal St. New Orleans
- Visit coastal site, such as these sites.
- Fly balloons, kites, gather imagery
- Record a latitude/longitude point
- Submit data on this form - Include a latitude/longitude point, even just as a text file!
- Data is uploaded to mapmill.org (just put it in the /public/sites folder)
- Imagery is posted in .zip file for raw download at grassrootsmapping.org/gulf-oil-spill
- Data is sorted
- Imagery is imported into Photoshop or Cartagen Knitter
- Imagery is exported as GeoTiff and GDAL is used to generate tiles
- Imagery is posted in KML, OpenLayers map, TMS, GeoTiff, and to Flickr
Other notes
GDAL workflow
Chandeleur plane flight stitch:
gdal_translate -of GTiff -a_srs EPSG:4326 -gcp 3255 2108 -88.832915 29.980864 -gcp 3866 3840 -88.829829 29.971664 -gcp 4149 12105 -88.827720 29.931097 -gcp 4055 8811 -88.828494 29.947264 -gcp 4150 10760 -88.827799 29.937574 -gcp 2394 6591 -88.837532 29.958312 -co "TILED=NO" chandeleur-flight-stewart-stitch.tif chandeleur-flight-stewart-stitch2.tif
gdalwarp -of GTiff -t_srs EPSG:4326 chandeleur-flight-stewart-stitch2.tif chandeleur-flight.tif
Long beach stitch:
gdal_translate -of GTiff -a_srs EPSG:4326 -gcp 15086 6114 -89.145513 30.345543 -gcp 9025 8330 -89.147437 30.344923 -gcp 9806 11582 -89.147205 30.344047 -gcp 11810 14993 -89.146562 30.343064 -gcp 24727 14849 -89.142418 30.343117 -gcp 21371 6520 -89.143494 30.345428 -gcp 16652 3005 -89.145045 30.346414 -gcp 9152 5013 -89.147429 30.345875 -co "TILED=NO" may-20-long-beach-mississippi.tif may-20-long-beach-mississippi-translated.tif
gdalwarp -of GTiff -t_srs EPSG:4326 may-20-long-beach-mississippi-translated.tif may-20-long-beach-mississippi-epsg-4326.tif
gdal2tiles.py -k --url=http://maps.grassrootsmapping.org may-20-long-beach-mississippi-epsg-4326.tif