[Mapserver-users] center map on x,y coordinates

Elisabeth Nolz e9625730 at student.tuwien.ac.at
Wed May 5 05:13:34 EDT 2004

hi paco.
i've tried scale=15000000 or scale=5000, but there's still this error: "
getNumeric(): Incorrect data type. "
perhaps you have an idea what's causing this problem.

On Tuesday 04 May 2004 16:04, Paco Regodon wrote:
The scale parameter is not clear, as it is related with RESOLUTION.

If your units are meters, you can calculate your escale using this formula:

scale = ((EXTENT * 100) * RESOLUTION / 2.54 ) / image_width_in_pixels.

RESOLUTION defaults to 72 dpi (dots per inch) but you can change it in the
mapfile if you need to.
Just try a big scale (scale=15000000).

Have you tried using MAPXY/BUFFER instead of MAPXY/SCALE?


On Tuesday 04 May 2004 11:24, Elisabeth Nolz wrote:
hi list.
in my application i have a drop-down menu with lots of addresses (addresses
and appropriate x,y coordinates stored in a mysql-database). the user can
choose one address and then click on the submit-button to show the map
centered on the chosen address.
the problem is, that i don't know how i could center my map on x,y

i found the following entry in the mapserver-user-history:
"If you have x,y coordinates for the centers of your parcels in your mysql
database, you can just run your search, grab the results, and redirect to a
url like:

i tried this link with my coordinates but it doesn't work this way. could
someone help me please?


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