Paul Curran wrote:
Hi,
I have had this problem for a couple of weeks now and I still cant get
past it. Basically when I view my map of the UK via openlayers it is
zoomed in very close. I want to zoom out but whatever I try doesn’t work
– usually results in just the background colour of my map being displayed.
I believe it might be my EXTENT which is incorrect as I am using
epsg:4326 (a spherical coordinate system). My map file is a Mapserver
Export from Quantim GIS and gave me the EXTENT -888385.321101
-31000.000000 1548385.321101 1271000.000000. How can I convert this into
a Geographic extent to match with my projection (epsg:4326)?
Hi Paul,
Here are my quick thoughts:
- your EXTENT parameter in your mapfile is not in DD coordinates, even
though you are telling MapServer that it is DD coordinates
- give a good read to the MapServer projections page:
http://www.mapserver.org/mapfile/projection.html
- optionally, if you want to pre-process your data into your output
projection, take a look at the gdal_translate
(http://www.gdal.org/gdal_translate.html) and ogr2ogr
(http://www.gdal.org/ogr2ogr.html) utilities for raster and vector data
(both are included in MS4W)
-jeff
--
Jeff McKenna
FOSS4G Consulting and Training Services
http://www.gatewaygeomatics.com/
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