[gdal-dev] reading VPF format NGA DNCs

[Martin Chapman]

Chris,

Here is what the ogr docs say.  Look in the directory structure of the VPF
to see what layer names and family names you have:

gltp:[//<hostname>]/<driver_name>/<dataset_name>:<layer_name>:<family>

Where <layer_name> is the OGDI Layer name, and <family> is one of: "line",
"area", "point", or "text".

Usage example 'ogrinfo':

ogrinfo gltp:/vrf/usr4/mpp1/v0eur/vmaplv0/eurnasia 'watrcrsl at hydro(*)_line'

In the dataset name 'gltp:/vrf/usr4/mpp1/v0eur/vmaplv0/eurnasia' the
gltp:/vrf part is not really in the filesystem, but has to be added. The VPF
data was at /usr4/mpp1/v0eur/. The 'eurnasia' directory should be at the
same level as the dht. and lat. files. The 'hydro' reference is a
subdirectory of 'eurnasia/' where watrcrsl.* is found.

Usage examples VMAP0 to SHAPE conversion with 'ogr2ogr':

ogr2ogr watrcrsl.shp gltp:/vrf/usr4/mpp1/v0eur/vmaplv0/eurnasia
'watrcrsl at hydro(*)_line'

ogr2ogr polbnda.shp  gltp:/vrf/usr4/mpp1/v0eur/vmaplv0/eurnasia
'polbnda at bnd(*)_area'

An OGR SQL query against a VMAP dataset. Again, note the careful quoting of
the layer name.

ogrinfo -ro gltp:/vrf/usr4/mpp1/v0noa/vmaplv0/noamer \
           -sql 'select * from "polbndl at bnd(*)_line" where use=26'

Martin 

-----Original Message-----
From: Christopher Barker [mailto:Chris.Barker at noaa.gov] 
Sent: Thursday, January 14, 2010 2:22 PM
To: chapmanm at pixia.com
Cc: 'gdal-dev'
Subject: Re: [gdal-dev] reading VPF format NGA DNCs

Martin Chapman wrote:
> Do you have the OGDI driver built and configured into GDAL?

well, orginfo tells me:

FAILURE:
Unable to open datasource `gltp:/vrf/a1611110' with the following drivers.
   -> ESRI Shapefile
   -> MapInfo File
   -> UK .NTF
   -> SDTS
   -> TIGER
   -> S57
   -> DGN
   -> VRT
   -> REC
   -> Memory
   -> BNA
   -> CSV
   -> GML
   -> GPX
   -> KML
   -> GeoJSON
   -> Interlis 1
   -> Interlis 2
   -> GMT
   -> SQLite
   -> DODS
   -> ODBC
   -> PGeo
   -> OGDI
   -> PostgreSQL
   -> MySQL
   -> XPlane
   -> AVCBin
   -> AVCE00
   -> Geoconcept

OGDI is in there -- so I assume that it's built in -- how else can I tell?

thanks,

-Chris


-- 
Christopher Barker, Ph.D.
Oceanographer

Emergency Response Division
NOAA/NOS/OR&R            (206) 526-6959   voice
7600 Sand Point Way NE   (206) 526-6329   fax
Seattle, WA  98115       (206) 526-6317   main reception

Chris.Barker at noaa.gov