Felix,
Extent defines the bounding box that you want do display as a default
for your map. The values need to be expressed in the same units as your
output spatial reference system. (e.g. if your data is in decimal
degrees of lat/long, your extent should be in decimal degrees). The
format is [minimum x value] [minimum y value] [maximum x value] [maximum
y value] . UNITS also needs to reflect the units of your output SRS.
Try:
EXTENT -73.795132 40.685928 -74.153979 40.846823
UNITS dd
Unless you are calling the layer by name in the URL request, change
STATUS to DEFAULT to ensure that the layer shows up.
David.
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Felix
Sent: Saturday, August 16, 2008 10:49 AM
To: mapserver-users@lists.osgeo.org
Subject: [mapserver-users] Mapserver TIF Layer
Hi,
I'm having some difficulty getting a map to show up. I've setup
the latest version of MapServer and I have a TIF with a TFW file.
I don't fully understand how EXTENT works, and I can't find any
decent explanation in the documentation. I'm trying to display a portion
of my map based on latitude and longitude. What do I need to put in my
EXTENT field so that I can get a map with top-left
(40.846823/-74.153979) and bottom-right (40.685928/-73.795132).
Thank you for any assistance!
Felix
Here is my TFW file:
63.545941999999989
0.0
0.0
-63.545941999999989
-421692.82776298042
-15874.371420191659
And my Map File:
MAP
NAME NY77SOUTH
STATUS ON
IMAGETYPE PNG
SIZE 500 500
SHAPEPATH "/var/www/html"
#West South East North
EXTENT -421692.82776298042 -15874.371420191659 0 0
UNITS METERS
PROJECTION
"proj=lcc"
"lat_1=46.666667"
"lat_2=41.333333"
"lon_0=-72.833333"
"lat_0=42.1"
"x_0=0.0"
"y_0=0.0"
"ellps=GRS80"
"datum=NAD83"
END
WEB
IMAGEPATH "/var/www/html/tmp/"
IMAGEURL "/tmp/"
END
LAYER
NAME "chart"
TYPE RASTER
STATUS ON
DATA "/var/www/html/NewYork77South.tif"
END
END
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