On 3/21/2013 4:08 AM, Rainer M Krug wrote:
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On 20/03/13 16:44, Andre Joost wrote:
Am 20.03.2013 16:01, schrieb Rainer M Krug:
What I don't like is that I have to specify t_srs in such a long way. It states
that t_srs
can be "a .prf file containing well known text", but I can't figure out what a
.pdf file is.
Would for exmple work, if I put
+proj=aea +lat_1=-28.25 +lat_2=-29.75 +lat_0=-29 +lon_0=30.75 +x_0=0 +y_0=0
+datum=WGS84
+units=m +no_defs
in t.prf and refer to it in gdalward as "-t_sts t.prf"?
No, the proj definition text is not "well known text" WKT.
Are there any examples available for prf files and allowed formats?
It's simply the same format as in every shapefiles .prj file.
For example ogr2ogr -s_srs epsg:3375 -t_srs epsg:4245 Malay-Kertau.shp
rivers-neu.shp ogr2ogr
-s_srs epsg:3375 -t_srs Malay-Kertau.prj Malay-prj.shp rivers-neu.shp
returns two identical outputs, where Malay-Kertau.prj contains the definition
used in the first
run with EPSG:4245.
Thanks for the response.
So the file Malay-Kertau.prj would then contain the text:
epsg:4245
?
No you would need something like:
GEOGCS["GCS_Kertau",DATUM["D_Kertau",SPHEROID["Everest_1830_Modified",6377304.063,300.8017]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]]
I found this here:
http://webhelp.esri.com/arcims/9.3/general/mergedprojects/ArcXMLGuide/elements/gcs.htm
webhelp.esri.com/arcims/9.3/general/mergedprojects/wms_connect/wms_admin/srs_list.htm
WKT for projections refers to ESRI projection info NOT proj4 epsg codes.
Read this:
http://www.nceas.ucsb.edu/scicomp/recipes/projections
-Steve W
So I have to put into the file simply the text as supplied to -t_srs ?
And what is the difference between a .prj file used by shape files and a .pdf
file (format wise)?
Rainer
Rainer
Greetings, André Joost
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- --
Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation Biology,
UCT), Dipl. Phys.
(Germany)
Centre of Excellence for Invasion Biology
Stellenbosch University
South Africa
Tel : +33 - (0)9 53 10 27 44
Cell: +33 - (0)6 85 62 59 98
Fax : +33 - (0)9 58 10 27 44
Fax (D): +49 - (0)3 21 21 25 22 44
email: [email protected]
Skype: RMkrug
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