Articles about map export formats, tools and OpenStreetMap data use cases.
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How to download a city map or site plan as DXF or DWG from OpenStreetMap: steps, the real layer names, metric coordinates, a sample file and an honest comparison with city portals.
How to get a 3D model of any city as STL from OpenStreetMap: buildings by OSM heights, terrain, a solid base, ready for the slicer. Example, print tips, FAQ.
A client ordered raster MBTiles for ATAK, saw GRG/BNG OUT OF AREA and thought the map was broken. What it was and how we built one file from three pyramids.
How to get a site location plan base in DWG from OpenStreetMap: which layers you need, what scale to pick, why the drawing must be in metres and how to open it in AutoCAD.
What Janome JEF is: header, threads, stitches and hoop. How a map becomes a running stitch: a 200×200 mm hoop, 4 stitches per mm and a stitch length limit.
How the hypsometric file is built: a height-to-colour ramp, gdaldem color-relief, transparent voids, multiply-blended shading and GeoTIFF, PNG or JPEG output.
A ROS occupancy grid: an image plus YAML, resolution and origin, three cell states, occupied and free thresholds, and a sanity check before navigation.
What the heightmap archive holds: a square 16-bit PNG, raw R16, georeferencing and a passport with min, max and side length. How to turn that into a Z scale.
What the MP format is: IMG ID, POLYLINE, POLYGON and POI sections, object types, detail levels, label codepages and the road from a text file to a compiled img.
An elevation matrix as text: what the XYZ, CSV or ASCII Grid archive holds, the step and precision, why there is a README and why large frames get coarser.
One SQLite container, two different maps: how MVT tiles differ from PNG tiles in size, styling, labels, Retina support and the clients that open them.
Inside the HTML map: Leaflet from a CDN, GeoJSON data inline, a layer switcher and attribute popups. What it needs to open and where its limits are.