Hi! This question originates from this earlier thread:
http://lists.umn.edu/cgi-bin/wa?A2=ind0801&L=mapserver-users&D=1&T=0&P=37923 But since I learned a lot during that thread and because the thread is full of all kinds of questions now I would like to ask a very specific question again in a new thread. I have also checked out the archives at this list and the PROJ list. I have found one similar question on this list in 2005: http://lists.umn.edu/cgi-bin/wa?A2=ind0504&L=MAPSERVER-USERS&P=R75005 Here is my question: I have set up a mapfile with projection parameters like this: EXTENT 10.6661 59.9155 10.6824 59.9213 PROJECTION "init:epsg:4326" END >From this mapfile I get a map over an small area in Oslo, Norway(I cannot publish the data since the data is not free) Then I change my map file to this: EXTENT 37074.96 6669762.95 37982.21 6670408.60 PROJECTION "+proj=eqc +lat_ts=60 +lon_0=0 +x_0=0 +y_0=0 +ellps=WGS84 +datum=WGS84 +no_defs +units=m" END The extent is calculated by using PROJ like this: proj "+proj=eqc +lat_ts=60 +lon_0=0 +x_0=0 +y_0=0 +ellps=WGS84 +datum=WGS84 +no_defs +units=m" < test.txt where test.txt consists of the geographic coordinates in my first map file. This mapfile creates a map about 18000 meters north of my first mapfile. This is similar to the post from 2005. Longitude seems to be correct. I do not understand why Mapserver does not create approximatly the same map in both map files? Is it not possible to use PROJ to convert coordinates like this? If I set lat_ts=0 I do of course get the same map, but that is not the projection I would like to use. And if I cannot do it like this, how can I calculate the shift in the y-coordinate(about 18000 meters in this example)? Kind regards, Espen
