Hi,

I'm working in GIS field, and trying to read format of .shp file 
programmatically. I know the format of .shp file and I can read 
header and all structures and infromation relating to them.

But the problem is that I got very large values for the 
coordinates.

for testing I developed a .shp file in AutocadMap that has only 
single polyline with coordinates
X1 = 5, Y1 = 5
X2 = 10, Y2 = 10

When I tried to read it thru my program  I got the values as 
follow :
X1 = 4.6173155179616     Y1 = 4.6173155179616
X2 = 4.6281911758897     Y2 = 4.6281911758897

I can read Integer values exactly but I have doubt that the 
formula for reading Double value might be wrong.  It is as follow 
:

Double Little Endian :

Result = byte7 * power(256,7)
          + byte6 * power(256,6)
          + byte5 * power(256,5)
          + byte4 * power(256,4)
          + byte3 * power(256,3)
          + byte2 * power(256,2)
          + byte1 * power(256,1)
          + byte0 * power(256,0)

Double Big Endian :

Result = byte0 * power(256,0)
          + byte1 * power(256,1)
          + byte2 * power(256,2)
          + byte3 * power(256,3)
          + byte4 * power(256,4)
          + byte5 * power(256,5)
          + byte6 * power(256,6)
          + byte7 * power(256,7)
I face the same problems through out the file for any 
coordinates.

I'll highly obligned for your help.

Thank you,





Shailesh Ganatra