[GRASS-windows] RE: 1. Convert from Meters to Degrees (Louis Becker)
Louis Becker
Louis.Becker at cellone.com.na
Fri Aug 29 10:53:09 EDT 2008
Hi Markus & Niel
Although I have been able to get a GeoTiff that works, I am still
wondering what to do should that not have been the case. As such please
find info as follows. I want to import a GeoTiff file into the following
location obtained with "g.region -p":
projection: 0 (x,y)
zone: 0
north: -16.95989
south: -28.96946
west: 11.71563
east: 25.2567
nsres: 0.6004785
ewres: 0.6770535
rows: 20
cols: 20
cells: 400
This is the gdalinfo for the file:
Driver: GTiff/GeoTIFF
Files: nam_trimmed_utm34.tif
Size is 2091, 1980
Coordinate System is `'
Origin = (-514892.022276454950000,8147409.058374555800000)
Pixel Size = (712.653318030000040,-712.653318030000040)
Metadata:
TIFFTAG_XRESOLUTION=300
TIFFTAG_YRESOLUTION=300
TIFFTAG_RESOLUTIONUNIT=2 (pixels/inch)
Image Structure Metadata:
COMPRESSION=LZW
INTERLEAVE=PIXEL
Corner Coordinates:
Upper Left ( -514892.022, 8147409.058)
Lower Left ( -514892.022, 6736355.489)
Upper Right ( 975266.066, 8147409.058)
Lower Right ( 975266.066, 6736355.489)
Center ( 230187.022, 7441882.274)
Band 1 Block=2091x8 Type=Byte, ColorInterp=Red
Band 2 Block=2091x8 Type=Byte, ColorInterp=Green
Band 3 Block=2091x8 Type=Byte, ColorInterp=Blue
How would I go about it?
Louis
-----Original Message-----
From: Louis Becker
Sent: 29 August 2008 11:50
To: 'grass-windows at lists.osgeo.org'
Subject: 1. Convert from Meters to Degrees (Louis Becker)
Hi Markus, Niel and others
I have unzipped my original GeoTiffs again and it seems that I lost (or
did not unzip) my ".tfw" before. It appears that this file contains the
Geo-referencing information because the import is working fine now.
Thanks for your responses and help.
Regards
Louis
----------------------------------------------------------------------
Today's Topics:
1. Convert from Meters to Degrees (Louis Becker)
2. Re: Convert from Meters to Degrees (Markus Neteler)
3. Wingrass-6.0.3-4-Setup.exe (Ted Nebitko)
----------------------------------------------------------------------
Message: 1
Date: Thu, 28 Aug 2008 10:52:03 +0100
From: "Louis Becker" <Louis.Becker at cellone.com.na>
Subject: [GRASS-windows] Convert from Meters to Degrees
To: <grass-windows at lists.osgeo.org>
Message-ID:
<C1B2EC3BA69ABF448336ED9C7A4FFDD80204BB79 at MAIL01.99eight.com>
Content-Type: text/plain; charset="us-ascii"
Hi
I am fairly new to Grass and GIS in general and suspect that there is
quite and easy answer to my question, but I have searched and searched
and just cannot come up with a solution. Please help.
I have a GeoTiff file that has its Lat/Long in meters. I would like to
overlay it on a layer with Lat/Long in degrees. The rest of the
projection/datum info is the same. If I just do a strait import, it
assumes that the Lat/Long is in degrees and of course it is displayed in
a total the wrong location in relation to degrees. How can I convert the
file in meters to be projected or imported in degrees? I searched and
searched, but can't find a solution.
Louis Becker
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Message: 2
Date: Thu, 28 Aug 2008 11:53:43 +0200
From: "Markus Neteler" <neteler at osgeo.org>
Subject: Re: [GRASS-windows] Convert from Meters to Degrees
To: grass-windows at lists.osgeo.org
Message-ID:
<86782b610808280253y2b3ca750qc662b48ed32ea549 at mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
Louis,
not sure what "Lat/Long in meters" is... can you please post the output
of gdalinfo on these maps to the list?
Markus
On Thu, Aug 28, 2008 at 11:52 AM, Louis Becker
<Louis.Becker at cellone.com.na> wrote:
> Hi
>
> I am fairly new to Grass and GIS in general and suspect that there is
> quite and easy answer to my question, but I have searched and searched
> and just cannot come up with a solution. Please help.
>
> I have a GeoTiff file that has its Lat/Long in meters. I would like to
> overlay it on a layer with Lat/Long in degrees. The rest of the
> projection/datum info is the same. If I just do a strait import, it
> assumes that the Lat/Long is in degrees and of course it is displayed
> in a total the wrong location in relation to degrees. How can I
> convert the file in meters to be projected or imported in degrees? I
> searched and searched, but can't find a solution.
>
> Louis Becker
>
> _______________________________________________
> grass-windows mailing list
> grass-windows at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/grass-windows
>
>
--
Open Source Geospatial Foundation
http://www.osgeo.org/
http://www.grassbook.org/
------------------------------
Message: 3
Date: Thu, 28 Aug 2008 08:48:51 -0400
From: Ted Nebitko <tnebitko at can.rogers.com>
Subject: [GRASS-windows] Wingrass-6.0.3-4-Setup.exe
To: grass-windows at lists.osgeo.org
Message-ID: <48B69EB3.2080403 at can.rogers.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
GISDBASE='D:/GRASS/data';
LOCATION_NAME='spearfish60';
MAPSET='PERMANENT';
WARNING: Attention!
WARNING: Locking is not supported on Windows!
GRASS GUI should be tcltk
__________ ___ __________ _______________
/ ____/ __ \/ | / ___/ ___/ / ____/ _/ ___/
/ / __/ /_/ / /| | \__ \\_ \ / / __ / / \__ \
/ /_/ / _, _/ ___ |___/ /__/ / / /_/ // / ___/ /
\____/_/ |_/_/ |_/____/____/ \____/___//____/
Welcome to GRASS 6.3.0 (2008)
GRASS homepage: http://grass.osgeo.org/
This version running thru: shell
(D:/GRASS/msys/bin/sh.exe)
Help is available with the command: g.manual -i
See the licence terms with: g.version -c
If required, restart the GUI with: g.gui tcltk
When ready to quit enter: exit
g.region -p
projection: 1 (UTM)
zone: 13
datum: nad27
ellipsoid: clark66
north: 4928010
south: 4913700
west: 589980
east: 609000
nsres: 30
ewres: 30
rows: 477
cols: 634
cells: 302418
The gis manager, however, opens and freezes with the following error
message:
/Error setting region (Problem with g.region?): child killed unknown
signal />/ />/ can't read "parts(w)": no such variable />/ while
executing />/ "set $parts(w) [expr
round9$parts(w)/$parts(ewres))*$parts(ewres)]*
/>/ (procedure "MapCanvass::zoom_gregion" line 16) />/ invoked from
within.............................
/>/
/>/ Any help is appreciated/
------------------------------
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