[OSGeo Africa] How to convert "New Namibia" projection to EPSG 4326 in QGIS

Tue Feb 6 06:06:31 PST 2018

Uazu,

That approach was the very first approach I tried:

1.      Open a blank project in qgis desktop 18.2, drag and drop the “regions.shp” file onto it. Moving the cursor around, it is obvious that the shapefile is using projected (UTM-like) coordinates.

2.      Right-click on the layer name, create a new layer called “region2” (whether as a shapefile or else as a GML file that I actually need has no impact on outcome)

3.      Select EPSG 4326 as the CRS

4.      When SAVING, I get

“Export to vector file failed.

Error: creation of layer failed (OGR error:Failed to create file Region2.shp: Permission denied)

I have no idea WHY it is refusing to create that derived layer – I have done similar things hundreds of times, and never seen this problem

Regards

Calle

From: Africa [mailto:africa-bounces at lists.osgeo.org] On Behalf Of Uazukuani
Sent: Monday, 05 February 2018 20:25
To: Africa local chapter discussions
Subject: Re: [OSGeo Africa] How to convert "New Namibia" projection to EPSG 4326 in QGIS

Hi Calle,

The New Namibia CRS parameters are just fine. You need to re-projects the files to your desired CRS.

I think the best way to go about that in QGIS, is to right click on the layer name and SAVE AS to create a new file. Ensure that CRS of the new file that you are creating, is changed to EPSG 4326 before saving.

I hope that helps. 

Uazu, 

Whk, Namibia

Sent from mobile.
Kindly excuse typos and brevity.

On 05 Feb 2018 5:59 PM, "Calle Hedberg" <chedberg at telkomsa.net> wrote:

Hi,

I’ve received two shapefiles from Namibia – originally from the National Statistics Agency, I think – which has the following .prj file:

PROJCS["New_Namibian",GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],

PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",600000.0],PARAMETER["False_Northing",10000000.0],PARAMETER["Central_Meridian",17.0],PARAMETER["Scale_Factor",1.0],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0]]

When I open the file in QGIS and hover over the maps, the coordinates shown are clearly projected coordinates.

My problem is that I need the maps in EPSG 4326 (WGS-84, geographical coordinates) format, and I’ve been unable to do the conversion – changing the value under shapefile->Properties make the shapefile disappear.

So I’m doing something wrong – probably something really dumb – but I don’t know WHAT….

Anybody able to give me step-by-step instructions on how to re-project “New Namibian” back to standard EPSG 4326?

Regards
Calle

Cape Town

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