Subject: [Ecrit] Direction of holes draft

From: "Thomson, Martin" <[email-masked]>
Date: Mon, 22 Jun 2009 20:01:49 -0500

Cullen raised some concerns about the additional feature that this document requires.  He suggested that an alternative would not require support of interior polygons, or holes.

I'd like to confirm that the WG is OK with taking the document as is, without making this proposed change.

Thanks,
Martin

Below is a summary of our discussion:
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The alternative does not use the <interior> element of the polygon to create holes.  Instead, polygons are sliced into two or more sections so that the “holes” became external to each section.  Each section is created as a separate mapping.

We concluded that the alternative solution proposed is viable, but the existing method is best when considering the deployment implications.

Alternative pros:

No additional functions required by the protocol.
No additional functions required by LoST implementations.

Alternative cons:

This isn’t how people think about the problem.
Regions with holes would need to be divided up by a provisioning system into multiple regions with separate mappings.
This likely requires changes to the provisioning and GIS systems that feed LoST, these systems already exist and therefore the cost is higher (at least we know that LoST implementations barely exist).
The existing solution is already documented and agreed.

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