[Marxan] cost layer from multible sources

Matt Perry mperry at ecotrust.org
Thu Jan 12 03:30:51 EST 2012

As you mentioned, the cost data needs to be on a single scale. Combining two cost datasets can be handled by a) assigning actual monetary costs to the selection of those areas and summing the dollar amounts or b) normalizing the data to an arbitrary index (e.g. 0 to 100) before summing. Either way, you must make assumptions about the relative importance of the two costs in order to combine them into a single measure.

Hope this helps.

·´¯`·.¸. , . .·´¯`·.. ><((((º>`·.¸¸.·´¯`·.¸.·´¯`·...¸><((((º>
Matthew Perry | Senior Applications Developer | Ecotrust
mperry at ecotrust.org<mailto:jtutak at ecotrust.org>  | 503.467.0817 | ecotrust.org<http://www.ecotrust.org/>

From: marxan-bounces at lists.sps.uq.edu.au [mailto:marxan-bounces at lists.sps.uq.edu.au] On Behalf Of Husam El Alqamy
Sent: Wednesday, January 11, 2012 3:47 AM
To: marxan at lists.science.uq.edu.au
Subject: [Marxan] cost layer from multible sources

Dear List
I have a question and hope to find an answer at yours. If I have 2 polygon data datasets (fishing rights areas  and oil fields) and I want to produce a cost layer using those 2 data elements, is this possible? I figured that converting them to raster layers and summing them would be a way around it but unfortunately I couldn't account for the different types of cost on a single scale. Could you please kindly advise.
Really appreciate it

Husam El Alqamy, B.Sc., M.Phil.
Sr. Biodiversity GIS Analyst ,
Environmental Information Sector, EIS
Environmental Agency Abu Dhabi,UAE
Antelope Specialist Group, ASG - IUCN

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