Hi all. This is my first attempt at using the mailing list... <br><br>I
have digitized a topo map's landuse classes into a vector layer, and
then converted the vector to a raster. I want to see how much land
would have been required for settlements at point x,y with population
of 'P' to sustain themselves. Example, for site 'Shuna' with a
population of 5000 I need 16 sq km (of landuse classes 1,2,5
(agricultural,olive,fruit)). <a href="http://arkygeek.blogspot.com/" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">http://arkygeek.blogspot.com</a> for a crude drawing of what i mean... <br><br>
What
I am trying to do is (ultimately) determine the radius of the circle
that will contain 'A' square meters of usable land. These are the general steps I have come up with...
<br><br>1. the landuse classification data<br> - convert the vector layer of classified land to a raster.<br clear="all"> <span><br>2. this new raster will contain 2 values - 0=not usable and 1=usable (??should i do this??) and then I can do this
<br> - ask for population size of settlement
<br> - ask for site to analyze which will give xy<br> - ask for ratio of crop:fallow (any other variables can be set here as well) <br> - computer determines amount of land required to sustain population <br>
- calculate the radius of a circle surrounding site that encompasses the required amount of land<br><br>3. The logic for calculating the radius looks like this: (??????)<br> <br> for every locality do<br> set solution found flag to false
<br> while solution not found<br> increment proposed radius<br> select all cells within proposed radius<br> test if solution is found<br><br>4. Once the radius is found, mask the results, convert the results to a vector, and this should give me the solution.
(???????)<br><br>Any suggestions???<br><br>Thanks for your time!<br clear="all"></span><span class="sg"><br></span><br clear="all"><br>-- <br>Jason Jorgenson<br>Post Grad Research Student<br>University of Liverpool<br><br>
"If you don't get out of the box you've been raised in, you won't understand how much bigger the world is." - Angelina Jolie