User Guidelines for GIS Data

Assumes installation of the relevant tools: InstallationGuidelinesGISData

Display Shapefile as Overlay Layer in Sahana Eden

e.g. Country Outlines:

• ​http://thematicmapping.org/downloads/TM_WORLD_BORDERS-0.3.zip

Import into PostGIS (or use pgAdmin III GUI's Shapefile loader on plugins menu)

createdb gis
createlang plpgsql gis
psql -d gis -f /usr/share/lwpostgis.sql
psql -d gis -f /usr/share/spatial_ref_sys.sql
shp2pgsql -s 4326 -I TM_WORLD_BORDERS-0.3.shp public.countries | psql -U postgres -W -d gis

Get GeoServer to serve as WMS

• tbc

Set up TileCache

• tbc

Add WMS Layer to Sahana Eden

• tbc

Convert Shapefile to an importable format

ogr2ogr -f CSV TM_WORLD_BORDERS-0.3.csv TM_WORLD_BORDERS-0.3.shp
ogr2ogr -f geojson TM_WORLD_BORDERS-0.3.json TM_WORLD_BORDERS-0.3.shp

If needing to reproject (e.g. for the ​Haiti Departements):

ogr2ogr -f CSV haiti_departments Haiti_departementes_edited_01132010.shp -s_srs EPSG:32618 -t_srs EPSG:4326 -lco GEOMETRY=AS_WKT

NB AS_WKT requires OGR v1.6+

Display Grid as Overlay Layer in Sahana Eden

tbc: BluePrintGISGrid

Display Topographic Maps

• ​http://wiki.openstreetmap.org/wiki/Contours
  • Uses ​SRTM (​ASTER is a future possibility)
• Alternate approach: ​SRTM 2 OSM

Handle Old Printed Maps

Old Printed Maps can be 'Rectified' to be overlaid on the base maps:

• ​http://warper.geothings.net/
• ​http://mike.teczno.com/notes/canvas-warp.html
  • Code: ​http://github.com/migurski/canvas-warp
• ​http://labs.metacarta.com/rectifier/

PostgreSQL management

• Connect to Database (or use pgAdmin III GUI's PSQL Console on plugins menu)

  psql -d my_spatial_db -U username
  

• List Databases

  \l
  

• List Tables

  \d
  

• List Table structure

  \d tablename
  select field/* from tablename where field = 'value';
  

PostGIS functions

• Centroids

  SELECT name, iso2, asText(ST_Transform(ST_Centroid(the_geom), 4326)) AS centroid FROM countries;
  

Data Sources

• VMap0: ​http://en.wikipedia.org/wiki/Vector_Map
• Admin 0 & 1, Hydro features, Raster & Vector: ​http://www.naturalearthdata.com/

OGC (WMS/WFS)

• ​http://geonetwork-opensource.org/geonetwork-nodes
• ​http://www.ogc-services.net
• BlueMarble & Mosaic (!LandSat7): ​http://onearth.jpl.nasa.gov/
• Hazard Layers ​http://preview.grid.unep.ch:8080/geoserver/ows?service=WMS&request=GetCapabilities
• Hazard Layers ​http://www.pdc.org/mde/services.jsp
• Massachusetts ​http://lyceum.massgis.state.ma.us/wiki/doku.php

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UserGuidelinesGIS

UserGuidelines