[mapserver-users] extent question

[Vu Pham]

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