[TZGISUG] global 30m land cover dataset - and ESRI AGOL layer

Sat Oct 18 19:09:31 EAT 2014

Nice one, thanks Anna.

I've just noticed that ESRI are in there too, with a 30x30m ArcGIS Online
service:

http://blogs.esri.com/esri/arcgis/2014/10/17/enhanced-shuttle-land-elevation
-data-srtm-30-meters-now-in-esri-world-elevation-services/

I don't have the bandwidth to look at this just now - anyone else?

Cheers now -

Nick.

From: TZGISUG [mailto:tzgisug-bounces at lists.habari.co.tz] On Behalf Of Anna
Estes via TZGISUG
Sent: 18 October 2014 08:47
To: Howard Frederick; Tanzania GIS Users Group Discussion
Subject: Re: [TZGISUG] global 30m land cover dataset

Hi All,

Well, I am finally in a position to answer Howard's question. The data were
a little difficult to get hold of, but I finally did, and have had a look.
Tanzania is covered by about 5 tiles, each of which is a 25-40mb download,
zipped (contrary to what the site says about 10mb downloads). You have to
request the data, then it takes several days for them to approve the
request, after which they will send your instructions to download via ftp
(keep an eye on your spam filter, as this is where all of my communications
from them went). Unfortunately, the first ftp login information they gave me
did not work, and I was unable to get anyone to respond to my request to
send new information. So I created another account and requested the data
again, and this time the ftp information worked, and I successfully
downloaded the data. I have only summarily looked over one of the tiles so
far (for the Maasai Steppe area), but I can say, that like most global
products, it does savanna very poorly indeed. Most wooded areas, even with I
would say 30+ percent cover, it is classifying as grassland in the areas
I've spot-checked. On the other hand, it seems to be doing at least a
reasonable job with even small-scale agriculture in those same areas. So I
guess how useful these classifications may be to you will depend on what you
are hoping to get out of them.

If you do want to download, go to the site and click on the Download link in
the upper right of the screen, and there it will show you all the tiles and
you can request the ones you want. There also seems to be a shapefile you
can download that shows all the tiles.

All the best,

Anna

On 10/4/2014 12:23 PM, Howard Frederick wrote:

Anna, this looks like a great set of data - but obviously a huge download!
What sort of total MB are you looking at for Tanzania?

On 3 October 2014 23:02, Anna Estes via TZGISUG <tzgisug at lists.habari.co.tz
<mailto:tzgisug at lists.habari.co.tz> > wrote:

Hi Everyone,

Please see the following announcement:

Dear friends: 

On the Sept 22, our 30 meter global land cover data sets, GlobeLand30, had
been handed over by China to United Nations to support the globl climate
change studies and sustanable develeopment.Now you can view and get the data
from the websites(glc30.tianditu.com <http://glc30.tianditu.com>  or
www.globallandcover.com <http://www.globallandcover.com/> ). Here are some
news reports.

http://sustainabledevelopment.un.org/index.php?page=view
<http://sustainabledevelopment.un.org/index.php?page=view&type=12&nr=1058&me
nu=1556> &type=12&nr=1058&menu=1556
http://unstats.un.org/unsd/GlobeLand30.htm
http://www.un.org/News/Press/docs/2014/sgsm16170.doc.htm

I hope this will contribute to the global research data infrastructures
supporting biodiversity and ecosystem sciences. I am looking forward to
discuss with you on future collaboration.

Best regards

Chen Jun

ISPRS president/ GEO SB-2 co-corrdinator

2014/9/29

I can't speak to the accuracy of this product, or even how it was created,
as I am just trying to download the tiles for TZ myself, but I thought some
of you might be interested in taking a look. It has cover products for both
2000 and 2010, so if it is a decent product, it could be very useful. 

Download tip: When entering in the tile numbers you would like to download,
please note that it is case sensitive.

All the best,

Anna

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