Monali Lodha wrote:
Thanks Stephen and Dan!
@Stephen
The recent Tiger Shapefiles come with .prj files and do have a
projection. Could there be a different issue then?
Mapserver does NOT look at the *.prj file. You have to do that yourself
and set the PROJECTION ... END blocks appropriately in mapserver.
@Dan
Regarding #1
Were all of your shapes in the same projection as the Itasca demo? If not,
their coordinates may have been far outside of the extents of the map.
Yes, we used the data for Itasca County.
SO you need to set the PROJECTION block in the MAP section AND each
LAYER needs to have a PROJECTION block. The one in the MAP section
defines the output projection to use and the ones in the LAYER define
what the source data's projection is (these can be determinged from the
*.prj file).
Regarding #2
Do you have 300 shapefiles, meaning you have 300 layers you wish to display?
If so, you might want to take a look at an alternate solution than the Itasca
demo. For example (toots own horn) GeoMOOSE is designed to allow multiple
mapfiles to be used within a single application. It makes the management of
the large number of layers much more palatable. We also have a number of users
that are at the same level of layer management as you are and could give more
suggestions on how to best manage that data for use in a Web GIS.
No. We have a few (10-15) layers. However, the shapefiles
corresponding to each layer are different for every county. I shall
also forward my query in the GeoMoose mailing list. Thanks!
Typically all county files for a given layer have identical structure in
TIGER so you can group them together using a TILEINDEX in the mapfile.
-Steve
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