11 10:32 PM
To: marc.hill...@tpg.com.au; dev4cx4...@snkmail.com
Cc: gdal-dev@lists.osgeo.org
Subject: Re: [gdal-dev] Confused about datum transformations
Hi Marc,
I suppose that when you say: WGS84 datum, you mean geographical coordinates
based on the WGS84-datum (i.e. lat,lon)?
Which other d
lto:
> r0dk224...@sneakemail.com]
> *Sent:* Wednesday, October 19, 2011 8:55 PM
>
> *To:* marc.hill...@tpg.com.au; dev4cx4...@snkmail.com
> *Cc:* gdal-dev@lists.osgeo.org
> *Subject:* Re: [gdal-dev] Confused about datum transformations
>
> ** **
>
> Hi Marc,
>
>
8:55 PM
To: marc.hill...@tpg.com.au; dev4cx4...@snkmail.com
Cc: gdal-dev@lists.osgeo.org
Subject: Re: [gdal-dev] Confused about datum transformations
Hi Marc,
Just to understand your problem fully: You have data in your database in
WGS84, in geographical coordinates,
THORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9108"]],AUTHORITY["EPSG","4326"]],PROJECTION["Transverse_Mercator"]
GDALError = .ImportFromEPSG(i)
> Debug.Assert(GDALError = OGRError.OGRERR_NONE,
> GetLastErrorMsg())
>End With
>
> Produces
> GEOGCS["GDA94",DATUM["Geocentric_Datum_of_Australia_1994",SPHEROID["GRS
> 1980",6378137,298.25722210
RITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4283"]]
The error when I attempt to create the transformation is always with the SRS
that seems to be a projection definition
-dev@lists.osgeo.org
Subject: Re: [gdal-dev] Confused about datum transformations
Marc,
You don't need to rebuild proj.4; you are already using it.. Since you were
able to use ogr2ogr to do the transformation, it works.
What you need to do is find out if the arguments you are passing t
that the datum numbers I use are in the gcs.csv file.
>
> ** **
>
> *From:* gdal-dev-boun...@lists.osgeo.org [mailto:
> gdal-dev-boun...@lists.osgeo.org] *On Behalf Of *dev4cx4...@snkmail.com
> *Sent:* Tuesday, October 18, 2011 4:12 AM
> *To:* gdal-dev@lists.osgeo.org
> *
@lists.osgeo.org
Subject: RE: [gdal-dev] Confused about datum transformations
I’m not sure the code will help too much, but here are the relevant code
fragments. I’m using a hand crafted VB.net wrapper which explains some of the
syntax
Private WGS84SRS As New OGRSpatialReference ' Coord
-dev@lists.osgeo.org
Subject: RE: [gdal-dev] Confused about datum transformations
I’m not sure the code will help too much, but here are the relevant code
fragments. I’m using a hand crafted VB.net wrapper which explains some of the
syntax
Private WGS84SRS As New OGRSpatialReference
Marc,
Looks like there might be a problem with the targetSRS. Please check if it
is ok. Try the exportToWkt method on it. Also, make sure the file pcs.csv in
gdal's data directory contains the entry for 3577.
On Tue, Oct 18, 2011 at 3:41 PM, wrote:
> I’m not sure the code will help too much, bu
I’m not sure the code will help too much, but here are the relevant code
fragments. I’m using a hand crafted VB.net wrapper which explains some of the
syntax
Private WGS84SRS As New OGRSpatialReference ' Coordinate system in WGS84
Private MapSRS As OGRSpatialReference ' Coordinate
Marc,
Can you provide the code leading to the error?
On Tue, Oct 18, 2011 at 1:21 PM, Marc Hillman wrote:
> I have a GIS database, and all data is stored in WGS84 datum. I have
> developed an application using GDAL, and I now need to translate my WGS84
> coordinates to several different datums,
I have a GIS database, and all data is stored in WGS84 datum. I have
developed an application using GDAL, and I now need to translate my WGS84
coordinates to several different datums, depending what map is loaded. I
seem to be going around in circles, and need a nudge in the right direction.
I am d
14 matches
Mail list logo
