[postgis-users] pgsql2shp usage

[Anisha Kaul]

Hello to all,

I hope this is the right mailing lists w.r.t pgsql2shp.

I downloaded an OSM map file namely "india.osm.bz2".
I transported it in PostgreSQL database "gis" with the command :

./osm2pgsql -m -d gis india.osm.bz2 

The above command resulted in the creation of the following tables filled with data in database "gis"

gis=# \d
                 List of relations
 Schema |        Name        |   Type   |  Owner
--------+--------------------+----------+----------
 public | geometry_columns   | table    | anisha
 public | planet_osm_line    | table    | anisha
 public | planet_osm_point   | table    | anisha
 public | planet_osm_polygon | table    | anisha
 public | planet_osm_roads   | table    | anisha
 public | polygon_oid_seq    | sequence | postgres
 public | spatial_ref_sys    | table    | anisha

Now to convert the map data of one of the above tables in a shape file, I issued the following command:

pgsql2shp -f myfile gis planet_osm_line

Output:
Initializing... Warning, field addr:housenumber renamed to ADDR:HOUSE
Warning, field addr:interpolation renamed to ADDR:INTER
Warning, field admin_level renamed to ADMIN_LEVE
Warning, field construction renamed to CONSTRUCTI
Warning, field power_source renamed to POWER_SOUR
Done (postgis major version: 1).
Output shape: PolyLine
Dumping: 
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 
[126149 rows].

Questions :
_______________________________________________________________________________________
Are these the right steps to load an OSM file in postgres ?
How should I verify that the shape file resultant of the above command is a valid and uncorrupted one ?
_______________________________________________________________________________________

I am worried because the projection file namely "myfile.prj" contains the following !

PROJCS["WGS84 / Simple Mercator",GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS_1984", 6378137.0, 
298.257223563]],PRIMEM["Greenwich", 0.0],UNIT["degree", 0.017453292519943295],AXIS["Longitude", 
EAST],AXIS["Latitude", NORTH]],PROJECTION["Mercator_1SP_Google"],PARAMETER["latitude_of_origin", 
0.0],PARAMETER["central_meridian", 0.0],PARAMETER["scale_factor", 1.0],PARAMETER["false_easting", 
0.0],PARAMETER["false_northing", 0.0],UNIT["m", 1.0],AXIS["x", EAST],AXIS["y", NORTH],AUTHORITY["EPSG","900913"]]

The latitude/longitude values don't seem to be of India !!!!

Kindly help !!
Thanking you in anticipation,

Regards,
Anisha Kaul

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