Name
Spatial Data Transfer Standard Files (SDTS)
Synopsis
This is a U.S. Geological Survey (USGS) format. SDTS has a raster and a vector format. The raster format isn't supported in MapServer; only the vector formats are supported, including VTP and DLG files.
File listing
SDTS files are often organized into state-sized pieces; for example, all pf the state of Maryland, U.S.A.
Files are also available for multiple types of features including hydrography, transportation, and administrative boundaries.
This example uses transportation data, which consists of 35 separate files, each with the suffix DDF.
MDTRAHDR.DDF MDTRARRF.DDF MDTRCATS.DDF MDTRDQCG.DDF MDTRFF01.DDF MDTRLE02.DDF MDTRNA03.DDF MDTRNO03.DDF MDTRSPDM.DDF MDTRAMTF.DDF MDTRBFPS.DDF MDTRCATX.DDF MDTRDQHL.DDF MDTRIDEN.DDF MDTRLE03.DDF MDTRNE03.DDF MDTRPC01.DDF MDTRSTAT.DDF MDTRARDF.DDF MDTRBMTA.DDF MDTRDDSH.DDF MDTRDQLC.DDF MDTRIREF.DDF MDTRNA01.DDF MDTRNO01.DDF MDTRPC02.DDF MDTRXREF.DDF MDTRARDM.DDF MDTRCATD.DDF MDTRDQAA.DDF MDTRDQPA.DDF MDTRLE01.DDF MDTRNA02.DDF MDTRNO02.DDF MDTRPC03.DDF
Data access/connection method
SDTS access is available in MapServer through OGR.
The
CONNECTIONTYPE OGR
parameter must be used.The path to the catalog file (????CATD.DDF) is required, including file extension.
There are multiple layers in the SDTS catalog, some of which are only attributes and have no geometries.
ogrinfo examples
Here's an example that uses ogrinfo
on a catalog file (note that the
first seven layers don't have geometries):
>
ogrinfo ...
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