[mapserver-users] extent question
Vu Pham
vu at sivell.com
Wed Mar 20 08:40:43 PST 2002
Stephen Woodbridge wrote:
> Download a copy of shapelib it has utilities dbfdump and shpdump which
> will display info about shapefiles. shpdump will display the extents
> info.
>
> http://gdal.velocet.ca/projects/shapelib/index.html
>
> -Steve
Hi Steve,
Thanks. I use shpdump to dump a shp file and it says
------------------------------------------------
Shapefile Type: Polygon # of Shapes: 51
File Bounds: ( -178.215, 18.925,3.75455e+072,0)
to ( -66.970, 71.407,0,0)
Shape:0 (Polygon) nVertices=276, nParts=3
Bounds:( -124.731, 45.543, 0, 0)
to ( -116.918, 49.000, 0, 0)
( -122.401, 48.225, 0, 0) Ring
( -122.462, 48.229, 0, 0)
( -122.453, 48.129, 0, 0)
[...]
--------------------------------------------------
Am I wrong if I say these numbers are longitute and attitute ? What is
the relationship between extent and long/lat ?
Thanks again,
Vu
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