extent is invalid for geotiff
John Bonk
bonk at EOSDATA.GSFC.NASA.GOV
Fri Feb 11 09:25:33 EST 2005
Ed,
Thanks again for all your help. The image fills up the entire img space in
the HTML template.
I was the one who originally input the garbage . When I cut and pasted the
EXTENT into the
map file, I copied the upper left and lower right corners instead lower
left, upper right. When
that didn't work I tried every possible permutation of those numbers and
never thought to look
back at the output from listgeo. So this was all the result of a stupid
mistake on my part.
Once again, thank you for you help,
John
At 18:49 2005-02-10 -0500, Ed McNierney wrote:
>John -
>
>OK - it sounds like you made a good diagnosis. If the PNG image looks
>the same in a viewer application as it does in the HTML template output
>from MapServer, then you don't have template problems.
>
>And you've also demonstrated that you can clearly and accurately follow
>instructions. This is an excellent skill. You would, therefore, do
>well to acquire instructions that are correct <g>!
>
>I made a typo in the EXTENT line I gave you, and you faithfully
>duplicated that typo in your map file. That's the problem - your X
>extent in the map file is much larger than your image's real extents.
>
>The MAXX value (the third number) from your listgeo output is
>-9325729.471, but I typed it as -932579.471, omitting the "2" that
>should be in the tens place. This made the maximum X value a much
>larger number than it should be, and MapServer is correctly generating a
>map of those (large) extents, with your GeoTIFF occupying a little bitty
>patch on the left.
>
>GIGO, as they used to say....
>
> - Ed
>
>Ed McNierney
>President and Chief Mapmaker
>TopoZone.com / Maps a la carte, Inc.
>73 Princeton Street, Suite 305
>North Chelmsford, MA 01863
>(978) 251-4242
>
>
>-----Original Message-----
>From: John Bonk [mailto:bonk at eosdata.gsfc.nasa.gov]
>Sent: Thursday, February 10, 2005 5:31 PM
>To: "Ed McNierney" <ed at topozone.com>
>Subject: RE: [UMN_MAPSERVER-USERS] extent is invalid for geotiff
>
>Ed,
>
>Once again, thank you very much for your reply. Please see below for
>answers to you questions embedded in your reply,
>
>John
>
>At 16:44 2005-02-10 -0500, Ed McNierney wrote:
> >John -
> >
> >You may have two separate problems, one of which may be a non-problem.
> >
> >1. If the image is "smaller than [you] would expect, and offset
> >vertically", could that simply be because the EXTENT is slightly larger
> >than the geographic extent of the image, and offset vertically? Try
> >adjusting the numbers in the EXTENT line. If you view the TIFF image
>in
> >an image viewer, does the imagery fill the frame, or is there blank
> >space around it?
>
>When viewed in an image viewer, the geotiff image fills the entire
>frame.
>
> >2. In your HTML template, you have somewhere an <IMG> tag to display
>the
> >map, which looks something like <IMG SRC=[img]....>. Is there a HEIGHT
> >and WIDTH field in that tag? Are they 300 and 400, respectively? If
> >those values don't match the SIZE in your map file, you're asking to
> >display the image at a different size than it was produced, which will
> >give odd results.
>
>The dimensions in the img tag in the HTML doc match the SIZE in the map
>file.
>BTW, the only reason I mention the png image, is that I can send it to a
>
>viewer
>where I can obviously see that the geotiff is left justified and
>displaced
>downward.
>It looks the same way in my browser when serving the map in map mode but
>its
>not as obvious without the frame. BTW, the geotiff part of the png is a
>bad
>fit, it
>covers only about 10% of the area of the png. If the png were a
>tictactoe
>board,
>the geotiff does not quite cover the rectangle in the first column
>second row.
>
>We tried playing around with the extent with mixed success. Well try
>again and
>let you know.
>
> > - Ed
> >
> >Ed McNierney
> >President and Chief Mapmaker
> >TopoZone.com / Maps a la carte, Inc.
> >73 Princeton Street, Suite 305
> >North Chelmsford, MA 01863
> >ed at topozone.com
> >(978) 251-4242
> >
> >-----Original Message-----
> >From: John Bonk [mailto:bonk at eosdata.gsfc.nasa.gov]
> >Sent: Thursday, February 10, 2005 3:55 PM
> >To: Ed McNierney; John Bonk; MAPSERVER-USERS at LISTS.UMN.EDU
> >Subject: RE: [UMN_MAPSERVER-USERS] extent is invalid for geotiff
> >
> >Ed,
> >
> >Thank you again for responding to my question.
> >
> >I'm still having problems understanding extent.
> >
> >When I serve up my geotiff with your extent using
> >
> >MAP
> > IMAGETYPE PNG
> > EXTENT -13053641.3 3358256.867 -932579.471 5752577.812
> >
> > SIZE 400 300
> > SHAPEPATH "data"
> >
> > LAYER # MODIS raster layer begins here
> > NAME modis
> > DATA RGB_mosaic_250m.tif
> > STATUS DEFAULT
> > TYPE RASTER
> > END # MODIS raster layer ends here
> >
> >END # end of map file
> >
> >I end up with an image that is smaller than I would expect, and offset
> >vertically.
> >
> >If I add an html template to the above and serve the geotiff in the
> >browse mode, the image in the geotiff occupies a very small area in the
> >png that is produced. The geotiff image is left justified and centered
> >vertically in the png.
> >
> >Can anyone explain why this is? How can I get the geotiff image to
>fill
> >the entire png?
> >
> >John
> >
> >
> >
> >At 09:41 2005-02-08 -0500, Ed McNierney wrote:
> > >John -
> > >
> > >No, there isn't any preferred method. A GeoTIFF will hold
>projection,
> > >datum, and bounding box information in a way that can be read by
> > >MapServer. As long as the GeoTIFF is created properly (i.e. you
>can't
> > >leave out the projection) the coordinate formats used don't matter.
> > >
> > > - Ed
> > >
> > >Ed McNierney
> > >President and Chief Mapmaker
> > >TopoZone.com / Maps a la carte, Inc.
> > >73 Princeton Street, Suite 305
> > >North Chelmsford, MA 01863
> > >ed at topozone.com
> > >(978) 251-4242
> > >
> > >-----Original Message-----
> > >From: UMN MapServer Users List [mailto:MAPSERVER-USERS at LISTS.UMN.EDU]
> > >On Behalf Of John Bonk
> > >Sent: Monday, February 07, 2005 11:39 AM
> > >To: MAPSERVER-USERS at LISTS.UMN.EDU
> > >Subject: Re: [UMN_MAPSERVER-USERS] extent is invalid for geotiff
> > >
> > >Ed,
> > >
> > >Thank you, that worked. I seems obvious now when I look back at the
> > >documentation.
> > >
> > >Perhaps someone can answer another question. In creating geotiffs,
>is
> > >there a preferred way of specify coordinates (degrees, UTM, etc) so
> > >that the image will work well with MapServer?
> > >
> > >Thanks again for the response,
> > >John
> > >At 23:10 2005-02-04 -0500, Ed McNierney wrote:
> > > >John -
> > > >
> > > >If that's the only data layer in your map, ignore PROJECTION
> > > >completely, at least for now.
> > > >
> > > >Have you tried an EXTENT of:
> > > >
> > > >EXTENT -13053641.3 3358256.867 -932579.471 5752577.812
> > > >
> > > > - Ed
> > > >
> > > >Ed McNierney
> > > >TopoZone.com
> > > >
> > > >-----Original Message-----
> > > >From: UMN MapServer Users List
>[mailto:MAPSERVER-USERS at LISTS.UMN.EDU]
> > > >On Behalf Of John Bonk
> > > >Sent: Friday, February 04, 2005 5:08 PM
> > > >To: MAPSERVER-USERS at LISTS.UMN.EDU
> > > >Subject: [UMN_MAPSERVER-USERS] extent is invalid for geotiff
> > > >
> > > >I am very new at this. I am having problems serving a geotiff
>image
> > > >with the following attributes:
> > > >
> > > >Projection Method: CT_Equirectangular
> > > > ProjCenterLatGeoKey: 0.000000 ( 0d 0' 0.00"N)
> > > > ProjCenterLongGeoKey: 0.000000 ( 0d 0' 0.00"E)
> > > > ProjFalseEastingGeoKey: 0.000000 m
> > > > ProjFalseNorthingGeoKey: 0.000000 m
> > > >
> > > >Corner Coordinates:
> > > >Upper Left (-13053641.300,5752577.812)
> > > >Lower Left (-13053641.300,3358256.867)
> > > >Upper Right (-9325729.471,5752577.812)
> > > >Lower Right (-9325729.471,3358256.867)
> > > >Center (-11189685.386,4555417.340)
> > > >
> > > >I have tried all sorts of variation of these number in the EXTENT
> > > >field
> > >
> > > >but I have been getting an 'extent is invalid' message.
> > > >
> > > >Can anyone help me express the EXTENT and PROJECTION to read this
> >file?
> > > >
> > > >John
> > > >=======================================
> > > >
> >
> >=======================================
>
>=======================================
>John Bonk
>SSAI/NASA GES DISC
>Phone:(301) 614-5280
>Fax: (301) 614-5268
>For more information about
>the NASA GES DISC and its services:
>http://daac.gsfc.nasa.gov/
=======================================
John Bonk
SSAI/NASA GES DISC
Phone:(301) 614-5280
Fax: (301) 614-5268
For more information about
the NASA GES DISC and its services:
http://daac.gsfc.nasa.gov/
More information about the mapserver-users
mailing list