how to input coordinates into homer energy

In the EPSG:3857 coordinate system the whole world map fits into a 20037508.3427892m square at zoom level 0. To use a drawing as input for dwg2maptiles and produce georeferenced map tiles, the drawing needs to be in the EPSG:3857 coordinate system. QCAD Professional comes with a separate command line tool to transform drawings from one coordinate reference system (CRS) to another: dwgmapconvert.ĭwgmapconvert is typically used to convert all coordinates in a given drawing file from a known, local coordinate system to the EPSG:3857 (sometimes called 'Web Mercator') coordinate system. This is the coordinate system used by most online maps, for example Google maps or mapbox. For this, a drawing usually has to be transformed from a local coordinate system into Web Mercator coordinates as commonly used by online maps. Here's the result of such an interactive drawing display generated with dwg2maptiles:ĭwg2maptiles can also be used to generate exact overlays for world maps. To further increase quality, we also use the -a switch for antialiasing. The argument tells dwg2maptiles to generate high-quality (hq, high-res, retina) tiles at 512x512px along with the standard resolution tiles at 256x256px. White lines should be corrected to black to make sure all lines are visible (-c). In the above example, we want the drawing to be rendered on a white background (-b white). The tiles are generated in the given output directory (-o) with the standard directory structure and file names for map tiles (z/x/y.png). Each additional zoom level typically requiring four times more time and disk space to generate than the previous one. Generating more zoom levels requires more time and disk space. Each time the user zooms in, the drawing is enlarged by a factor of 2, so with 6 zoom levels, the user can zoom in by a factor of 2^6 (=64). This means that starting from level 0 (whole drawing of auto zoom), the user can zoom in 6 times until the limit is reached. The -z switch specifies the zoom levels to generate, here from zoom level 0 to zoom level 6. Here's an example that generates the map tiles for any given drawing file: dwg2maptiles -z 0-6 -c -b white -a -o path/to/output/directory drawing.dxf The simplest use case for an online map is to provide visitors of a web site with an interactive, zoomable view of a drawing.

Leaflet is a JavaScript library to work with interactive maps in a browser.

QCAD comes with two command line tools to create map tiles for use with online map displays such as Leaflet.

How to input coordinates into homer energy