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spacesyntax / CatchmentAnalyser

Calculate catchments from multiple origins using multiple costs.
GNU General Public License v3.0
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some lines disappear from the result with some networks #7

Closed Anafi closed 7 years ago

jorgegil commented 7 years ago

The tool tries to identify and remove duplicates based on line length. I can imagine it will remove other lines if they have the same length, even if they are not duplicate. The current algorithm must be revised to address this approach. Might also be related to #6.

jorgegil commented 7 years ago

Since #6 is fixed, it's possible that this one is fixed as well.

Please note, the tool currently only includes in the catchment those segments that are entirely within distance (both start and end). It's possible that some lines look like they would be but are not based on this restriction. Also, lines might be within the polygon but not in catchment. The polygon is only an approximation, and the other alternative would be a small buffer.

jorgegil commented 7 years ago

With the changes to issue #14 it's likely that this problem is not noticed any more. The network output is now more inclusive, and the polygon output accurate.

I'll close for now as I haven't observed this in tests. Can reopen if the issue pops-up with a clear pattern: what lines and what networks.