[Mapserver-users] Can't seem to get the projection correct

[Martin, Daniel]

Well, perhaps MapInfo is lying to me, but it says the projection I am after
*is* latlong.  It says:  "Latitude/Longitude (NAD 27 for the Continental
US)"

I've tried NAD 27:
    proj=latlong
    ellps=clrk66 
    datum=NAD27 
    no_defs

But when I do, my map simply disappears!

Thanks,
Dan Martin

> -----Original Message-----
> From: Ed McNierney [mailto:ed at topozone.com]
> Sent: Tuesday, February 18, 2003 10:42 AM
> To: Martin, Daniel; mapserver-users at lists.gis.umn.edu
> Subject: RE: [Mapserver-users] Can't seem to get the 
> projection correct
> 
> 
> Daniel -
> 
> You need to know what projection you're trying to emulate.  It is VERY
> unlikely that any map you find in an atlas is using the "geographic"
> projection you're using in your map.  The example you show 
> from MapInfo
> *might* be a Mercator projection (which you might commonly find in
> atlases, too), which STRETCHES areas near the poles (i.e. Greenland
> isn't nearly as big as most people think).  That's why your 
> unprojected
> data might appear squished by comparison.
> 
> 	- Ed
> 
> Ed McNierney
> President and Chief Mapmaker
> TopoZone.com / Maps a la carte, Inc.
> 73 Princeton Street, Suite 305
> North Chelmsford, MA  01863
> Phone: (978) 251-4242  Fax: (978) 251-1396
> ed at topozone.com
> 
> 
> -----Original Message-----
> From: Martin, Daniel [mailto:DMartin at erac.com] 
> Sent: Tuesday, February 18, 2003 11:28 AM
> To: mapserver-users at lists.gis.umn.edu
> Subject: RE: [Mapserver-users] Can't seem to get the 
> projection correct
> 
> David,
> Thanks for your suggestion.  I tried it but it's not quite what I'm
> looking
> for.  I want horizontal lines of latitude, as I have now.  I'd just
> rather
> have the vertical less squished.
> 
> All,
> I've attached a map displaying identical data in MapInfo and 
> MapServer,
> with
> both applications' projection set to latlong.  In comparison you can
> clearly
> see that the MapServer output is vertically squished.
> 
> This isn't limited to MapInfo.  Nearly any map I can find of a
> particular
> area from any source (Mapquest, an atlas, anywhere) is similar to the
> MapInfo view, and the MapServer view looks "squished", for lack of a
> better
> term.
> 
> I've attached a map file below.
> 
> I appreciate the help guys,
> Dan Martin
> 
> #
> # Start of map file
> #
> NAME NorthAmerica
> STATUS ON
> SIZE 800 600
> UNITS dd
> IMAGECOLOR 255 255 255
> FONTSET "..\fonts\fontset.txt"
> SYMBOLSET "..\symbols\symbolSet.txt"
> IMAGETYPE PNG
> 
> #
> # Projection definition, consult the PROJ.4 documentation for 
> parameter
> discussion
> #
> PROJECTION
> 		proj=latlong
> END
> 
> #
> # Start of web interface definition (including WMS enabling metadata)
> #
> WEB
>   TEMPLATE ../Clients/rosaClient.html
>   MINSCALE 1000
>   IMAGEPATH "\inetpub\wwwroot\temp\"
>   IMAGEURL "/temp/"
> 	HEADER "../queryTemplates/query_head.html"
> 	FOOTER "../queryTemplates/query_foot.html"
> 	EMPTY "../MapServer/noRecords.html"
> END
> 
> QUERYMAP
>   SIZE 200 200
>   STATUS ON
>   STYLE HILITE
>   COLOR 255 255 0
> END
> 
> 
> # Start of reference map
> 
> REFERENCE
>   IMAGE ../referenceImages/us-reference.gif
>   EXTENT -124.986016 24.403641 -66.490832 68.268767
>   SIZE 160 120
>   STATUS ON
>   COLOR -1 -1 -1
>   OUTLINECOLOR 255 0 0
> END
> 
> 
> # LEGEND object
> LEGEND
>    STATUS off		 
>    KEYSIZE 40 16
> 	 OUTLINECOLOR -1 -1 -1
>    TEMPLATE "../legendTemplates/checkBox_legend.html"
> END
> 
> #
> # Start of scalebar
> #
> SCALEBAR
>   IMAGECOLOR 0 125 90
> 	BACKGROUNDCOLOR 150 230 150
> 	OUTLINECOLOR 255 255 255
>   LABEL
>     COLOR 255 255 255
>     SIZE large
>   END
>   STYLE 0
>   SIZE 200 10
>   COLOR 255 255 255
>   UNITS miles
>   INTERVALS 3
>   TRANSPARENT TRUE
>   STATUS TRUE
> END
> 
> # Start of layer definitions
> #
> LAYER
>   NAME "USA"
> 
>   PROJECTION
>     "proj=latlong"
>   END
> 
>   CONNECTIONTYPE OGR
>   CONNECTION "\GISData\Namerca\USA\Usa_Maps\USA.TAB"
> 
> 	STATUS DEFAULT
>   TYPE POLYGON
>   CLASS
>     COLOR 225 225 185
>     OUTLINECOLOR -1 -1 -1
>   END
> END
> 
> LAYER
>   NAME "Canada"
> 
>   PROJECTION
>     "proj=latlong"
>   END
> 
>   CONNECTIONTYPE OGR
>   CONNECTION "\GISData\Namerca\Canada\Canada.TAB"
> 	STATUS DEFAULT
> 
>   TYPE POLYGON
> 
>   CLASS
>     COLOR 225 225 185
>   END
> END
> 
> END
> > -----Original Message-----
> > From: Ed McNierney [mailto:ed at topozone.com]
> > Sent: Tuesday, February 18, 2003 9:59 AM
> > To: Martin, Daniel; mapserver-users at lists.gis.umn.edu
> > Subject: RE: [Mapserver-users] Can't seem to get the 
> > projection correct
> > 
> > 
> > Daniel -
> > 
> > Unfortunately <g>, the map looks just fine.  What were you 
> expecting?
> > Do you have a sample of what a "geographic" projection of 
> > that area does
> > look like?  Canada's going to get stretched quite a bit that way.
> > 
> > 	- Ed
> > 
> > Ed McNierney
> > President and Chief Mapmaker
> > TopoZone.com / Maps a la carte, Inc.
> > 73 Princeton Street, Suite 305
> > North Chelmsford, MA  01863
> > Phone: (978) 251-4242  Fax: (978) 251-1396
> > ed at topozone.com
> > 
> > 
> > -----Original Message-----
> > From: Martin, Daniel [mailto:DMartin at erac.com] 
> > Sent: Tuesday, February 18, 2003 10:51 AM
> > To: mapserver-users at lists.gis.umn.edu
> > Subject: [Mapserver-users] Can't seem to get the projection correct
> > 
> > I've been playing with my projections for some time now, with no
> > success.
> > I'm using entirely OGR data (MapInfo data to be exact).  All 
> > the data is
> > in
> > latlong.  No matter what I try, I end up with maps that are 
> vertically
> > challenged (squished).  See the attachment.
> > 
> > I'd appreciate any advice you can offer.
> > 
> > Thanks,
> > Daniel Martin
> > 
>