[TZGISUG] Tanzania Polygon

[Howard L Frederick]

Hi Mike - 

50m isn't too bad - I'd be inclined to use that adjusted districts layer and then snap it (suspect a GRASS tool would work?) to the regions; certainly would be adequate for national maps.

Which water boundary shapefile do you mean?
On 16 April, 2014 at 10:34:30, Mike Shand (mike.shand at glasgow.ac.uk) wrote:

Hi Howard,

I found the same problem.
I did a vector spatial adjustment in ArcGIS and when it fitted well in the north it was off in the south by approx 50m and viceverca.
So clearly there is a problem with the shapefiles and I'm sure it is not simply or only a projection issue.

I also have issues with the border interpretation along the coastline and lake shores.  The water boundary shapefile is also out of alignment with the boundaries.

Regards,
Mike


On 16/04/2014 07:44, Howard L Frederick wrote:
Hi Langen - thanks for that link!

The archive has:
International boundary (line)
Districts (poly)
Regions (poly)
All are identified as Arc 1960 latlon.

Problem: 'Districts' does not line up with the other two layers (shifted NNW by ~ 250m); the other layers line up well with other vector data I have, so I suspect there's a misidentification of datum - however, changing it to Arc 1950 or WGS 84 doesn't seem to help. 

Anyone have ideas on how to fix it?

Cheers - Howard

On 15 April, 2014 at 18:16:10, Langen R. M. Mallya (cutlan at yahoo.com) wrote:

Hi,

Try http://www.nbs.go.tz/takwimu/references/GIS_Maps.zip



 
Yours,
Langen R. M. Mallya,
Chief Consultant,
(Geomatician, GIS Specialist, Programmer, Google Earth Trainer),
Member IST, TZGIS User Group, EIS, AAG & GISCorps Volunteer,
Cutlan Consultant,
P. O. Box 16967,
Arusha,
Tanzania.


Phone #: +255-78-444-5465
Fax #: +255-27-253-0246
e-mail: info at cutlan.co.tz
e-mail: cutlan at yahoo.com
http://www.cutlan.co.tz/




"In the end, we will remember not the words of our enemies, but the silence of our friends."
On Tuesday, April 15, 2014 3:36 PM, Andrew Wallace <andywallace3 at aol.com> wrote:
I am looking for an ESRI shape file of Tanzania's regions to view on QGIS. It needs to include the post 2012 regions (Katavi, Simiyu etc)
Any help would be greatly appreciated.

Regards,

Andrew 

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