Re: [UMN_MAPSERVER-USERS] Help needed in Raster/World file

Ed McNierney Tue, 09 May 2006 05:22:45 -0700

Raffle -

That's an important difference! If you have a TFW file in the first place, gdalinfo will simply return its contents to you. So you're using the contents of your TFW file to decide what information to put in your TFW file....

You seem to have no georeferencing information in that file. What information do you have about the projection and coordinate extents of that input image? Do you need to only display this single layer, or do you need to integrate it with other data layers?

- Ed

Ed McNierney
President and Chief Mapmaker
TopoZone.com / Maps a la carte, Inc.
73 Princeton Street, Suite 305
North Chelmsford, MA 01863
Phone: +1 (978) 251-4242
Fax: +1 (978) 251-1396
[EMAIL PROTECTED]

From: UMN MapServer Users List [mailto:[EMAIL PROTECTED] On Behalf Of raffle peter
Sent: Tuesday, May 09, 2006 3:32 AM
To: [email protected]
Subject: Re: [UMN_MAPSERVER-USERS] Help needed in Raster/World file

I changed the status from On to Default but still its not working. One thing i want to tell you that if i delete the .tfw file the output of gdalinfo also changed which like this--->

#gdalinfo test.tif ### Without test.tfw file ######

Driver: Gtiff/GeoTiff

Size is 1042, 722

Co-ordinate System is `'

METADATA

----------

Upper Left (0.0, 0.0)

Lower left (0.0, 722.0)

Upper right (1042.0, 0.0)

center(521.0, 361.0)

Band 1 Block=1024*64 TYPE=BYTE, ColorInterp=RED

..........................................................................=Green

......................................................................=BLUE

Then what will be my values in my .tfw file? Now if i put the values in my .tfw file then the output of my gdalinfo also changed according to the values that i put there.

Where is the problem? Whether i need to put Projection statement in my mapfile?

Please help me

Thanks in advance

Raffle

Ed McNierney <[EMAIL PROTECTED]> wrote:

Raffle -

If you set your LAYER to STATUS ON it won't display - you need to set it to STATUS DEFAULT.

     - Ed

Ed McNierney
President and Chief Mapmaker
TopoZone.com / Maps a la carte, Inc.
73 Princeton Street, Suite 305
North Chelmsford, MA 01863
Phone: +1 (978) 251-4242
Fax: +1 (978) 251-1396
[EMAIL PROTECTED]

From: UMN MapServer Users List [mailto:[EMAIL PROTECTED] On Behalf Of raffle peter
Sent: Monday, May 08, 2006 7:12 AM
To: [email protected]
Subject: Re: [UMN_MAPSERVER-USERS] Help needed in Raster/World file

Hi

    I have given the mapfile below and after modifying the value as you suggested in

your previous, I am not getting the raster image on my final output.

Thanks in advance

Raffle

NAME "Europe"

SIZE 200 200

STATUS ON

SYMBOLSET ....."

EXTENT 2700051.860 2462746.020 3582564.801 3012459.468

UNITS METERS

SHAPEPATH " "

WEB

IMAGEPATH ""

IMAGEURL ""

END

.......

LAYER

DATA "/usr/local/apache/htdocs/gmap/htdocs/data/europe.tif"

NAME "raster_back"

TYPE RASTER

STATUS ON

END

END

Raffle -

Zero is a perfectly nice number! There's nothing wrong with 0.0 in your world file, especially in the second and third lines. For the vast majority of raster images you will find that the fourth line is the same as the first line with the sign reversed, and the second and third lines are 0.0. A world file will often look like:

100.0

0.0

0.0

-100.0

12345.67

987654.32

    - Ed

Ed McNierney
President and Chief Mapmaker
TopoZone.com / Maps a la carte, Inc.
73 Princeton Street, Suite 305
North Chelmsford, MA 01863
Phone: +1 (978) 251-4242
Fax: +1 (978) 251-1396
[EMAIL PROTECTED]

From: UMN MapServer Users List [mailto:[EMAIL PROTECTED] On Behalf Of raffle peter
Sent: Saturday, May 06, 2006 9:07 AM
To: [email protected]
Subject: [UMN_MAPSERVER-USERS] Help needed in Raster/World file

Hi

     I am trying to include a .tif file for raster background. For that i have to write a .tfw(world file) for the corresponding .tif file. The information that i need to put in the world file are X, Y Pixel size, rotational co-efficient and X, Y location of the center of the top left pixel. I am trying to find these values by using gdalinfo-- but some values are 0.0

in their corresponding field.

   Can anyone plz help me, how to get/set these values for the world file so that i can

keep my raster data georeferenced with other layers in my mapfile.

Thanks in advance

Raffle

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Re: [UMN_MAPSERVER-USERS] Help needed in Raster/World file

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