Community-Based Resource Mapping: Caraga Region, S. Philippines

The only map you can buy in a shop is this NAMRIA 'Army map' from 1:50,000 topographical of circa 1950 It takes a 400km round trip and three days to buy one locally, and it lacks detail like the National Highway, roads, placenames and a kilometre grid. Although very accurate relatively, modern georeferencing software and GPS reveal that its basic calibration is more than 100 metres out. And during the course of half a century, the coastline and rivers have changed, by erosion.

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