GeoEye and the Humanitarian OpenStreetMap Team (HOT) are collaborating to trace new satellite imagery of Salajar Island, Indonesia, an under-mapped area in OpenStreetMap. This is part of HOT’s larger work in Indonesia organizing workshops, competitions, and mapping events to provide detailed OSM maps for use by disaster first-responders and policymakers to aid in the country’s emergency preparedness efforts. To help HOT’s tracing efforts we processed imagery for Salajar Island from the GeoEye-1 satellite, which captures panchromatic (black and white) images at a resolution of 0.5 meters per pixel, and multispectral imagery (red, green, blue and near infrared) at a spatial resolution of 1.65 meters. A key step in our data processing was pansharpening, which merges the lower-resolution color image with the higher-resolution panchromatic one. Read More
