wiki:UserGuidelines/GIS/Data

Version 14 (modified by Fran Boon, 11 years ago) ( diff )

Rectifiers

User Guidelines for GIS Data

Assumes installation of the relevant tools: InstallationGuidelinesGISData

Display Shapefile as Overlay Layer in Sahana Eden

e.g. Country Outlines:

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

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

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

Handle Old Printed Maps

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

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

OGC (WMS/WFS)


UserGuidelinesGIS

UserGuidelines

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