[mapserver-users] extent question

[Stephen Woodbridge]

The File Bounds:  (MINX, MINY, MINZ, MINV)
              to   (MAXX, MAXY, MAXZ, MAXV)

and

EXTENT  MINX  MINY  MAXX  MAXY

This file is in UNITS DD
(longitude, latitude)

-Steve

Vu Pham wrote:
> 
> 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