[HOT] 50cm imagery available over Tierralta, Colombia

Harry Wood mail at harrywood.co.uk
Thu May 10 14:35:15 BST 2012


I've set up that info on this page: http://wiki.openstreetmap.org/wiki/Tierralta

...which is linked from the Colombia page (currently in bright yellow)

I think it's fine for that to be in English, and somebody could set-up 'ES:Tierralta' to mirror the same content in Spanish.  The bit where I've linked it on the 'WikiProject Colombia' page... that should probably just be swapped to be in spanish.

But anyway, enough wiki fiddling. Let's try out this imagery.

Harry


________________________________
 From: Frédéric Bonifas <fredericbonifas at gmail.com>
To: talk-co at openstreetmap.org; hot at openstreetmap.org 
Sent: Thursday, 10 May 2012, 12:17
Subject: [HOT] 50cm imagery available over Tierralta, Colombia
 
Hi,

(Sorry for writing in English on talk-co but I don't speak Spanish
unfortunately).

== Context ==
The ICRC (International Committee of the Red Cross) is looking for
some support from the HOT community to digitize on top of a satellite
image they have acquired over the city of Tierralta in North-West of
Colombia.
The image is 50 cm resolution, comes from the WV2 sensor (Digital
Globe) and was acquired the 12th of March 2011.
The ICRC will use the image and the OSM tracing to work on a Water and
Sanitation project.

== What to map ? ==
The ICRC is very interested in the landuse (buildings and natural
features), but the roads can of course also be mapped !

== How-to use the imagery ? ==
To add the imagery in JOSM :
* Open the preferences and go to the WMS/TMS tab
* Click on the "+" at the bottom right to add the new imagery, a
dialog window opens
* At the top, give a name to the imagery, e.g. "Tierralta ICRC". At
the bottom, in the "Imagery URL" field, paste this :
http://maps.itos.uga.edu/ArcGIS/services/GIST/CO_HOT/ImageServer/WMSServer?FORMAT=image/png&VERSION=1.1.0&SERVICE=WMS&REQUEST=GetMap&Layers=0&SRS={proj}&WIDTH={width}&HEIGHT={height}&BBOX={bbox}
* Click OK and the imagery is now available in the "Imagery" menu.
* When you zoom in or out, you need to right-click on the name of the
imagery in the "layers" list and the click on "change resolution"

The source tag to use is "ICRC, DigitalGlobe 120311"

== What comes next ? ==
Once a large part of the imagery is digitized in OSM, the ICRC team in
Tierralta will use Walking-Papers to enhance the map with POIs and
street names.


I would like to document this on the OSM wiki but the Wikiproject
Colombia is in Spanish. Could someone from the Colombian community add
this imagery in the wiki where relevant ?

This workflow went well and efficiently in Walikale, Congo. You can
read this article on the ICRC website talking about this collaboration
: http://www.icrc.org/eng/resources/documents/interview/2012/mapping-interview-2012-04-05.htm
Hope we will do even better this time !
I am available if you need any other information.

Best

Fred

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