Quick start. Choose a background map, add objects from the Add Object tools, then select any object to edit its coordinates, style, buffers, notes, and layer. Line, polygon, circle, and export-area drawing can snap to existing object points. Use the Layers section to reorder, hide, lock, or select the active drawing layer.
Map notes. Use the notes below the map title for author details, sources, caveats, and links. They are included in interactive HTML exports.
Export areas. Use Files > Define export area to draw a rectangular PNG crop. The format selector can constrain new export areas to common ratios. Use Save visible map as PNG for the current viewport, or select an export area and use Save area as PNG for a crop. PNG exports need a raster background map or no background map; vector overlays can be exported as interactive HTML maps.
Images. Use Add Object > Image to place a local image in the active drawing layer. Select it and use Edit shape to drag corners for resizing, the centre handle for moving, or the rotation handle for rotating. The image georeferencing panel uses editable control point rows: type original image X/Y pixels, type map coordinates, or pick either side from the map in any order before applying an affine fit. Three complete pairs produce an exact affine fit; four or more produce a least-squares affine fit with residual errors. Control points are shown as small crosshairs labelled P1/M1, P2/M2, and so on, and the manual warp controls can apply numeric rotation, scale, skew, and offset adjustments.
Vector overlays. Enable Vector overlays (OpenFreeMap) in Background Map, then use Filter Vector Overlays to show or hide roads, rail, places, borders, water, chokepoints, airports, ports, and other vector details. These overlays are visible in the app and interactive HTML exports, but are not included in PNG exports.
Coordinates. Search, coordinate input, and coordinate editing accept decimal degrees, DMS, and MGRS. The Settings panel controls how coordinates are displayed and copied.
Settings. Settings can show horizontal and vertical scale bars, set their positions and divisions, choose display units, adjust export attribution, and reset new-object drawing defaults.
Measurements. Distances and areas are calculated geodesically with Turf/Leaflet helpers and are intended for field planning and OSINT sketching, not survey-grade engineering. Circles and buffers are generated on the globe rather than as simple screen pixels.
Attribution. Background maps retain their source attribution in the map and exported interactive HTML. Respect OpenStreetMap, OpenTopoMap, Esri, CARTO, and any loaded data licenses.
Shortcuts. Draw with 1 point, 2 line, 3 polygon, 4 circle, 5 text box, 6 unit. Use S for search, E edit points/shapes, M move, Enter finish drawing, Esc cancel active input/drawing/editing, Delete remove, Ctrl+Z undo, Ctrl+S save GeoJSON, Ctrl+C copy object, Ctrl+V paste object at cursor, C copy object coordinates, Shift+C copy cursor coordinates. In Edit points mode, click a line or polygon point to select it, click a segment to add a point, use plus handles or Add Start/End Point to extend lines, and use Delete Point, Del, or Backspace to delete the selected point.