Several websites offer instant conversion, but they come with significant risks.
: These often have file size limits or require a paid subscription for complex datasets. 3. Viewing in Google Earth Once exported, you can open the file directly: How to convert a CAD file to KML/KMZ with AutoCAD Map 3D autocad dwg to kmz
to select your local coordinate system (e.g., a specific UTM zone). Verification SPMBGMAPSHOW Several websites offer instant conversion, but they come
| Problem | Likely Cause | Solution | | :--- | :--- | :--- | | (0° lat, 0° lon) | No coordinate system assigned or the drawing is at 0,0. | Use GEOGRAPHICLOCATION to move geometry to correct UTM coords. | | Lines are "jagged" or "wavy" in Google Earth | Arc segments or splines not converted properly. | Explode arcs and splines into short polylines ( FLATTEN command). | | KMZ file is huge (over 50 MB) | Too many vertices or embedded raster images. | Use MAPLINECLEAN to weed vertices. Remove rasters. | | Text labels missing | AutoCAD Text entities don't convert natively to KMZ labels. | Convert text to polylines ( TXTEXP command) or manually recreate as point placemarks. | | Colors are wrong | Google Earth uses a different color palette (RGB vs. AutoCAD's ACI). | In Map 3D export, map AutoCAD True Colors explicitly to KMZ colors. | | Objects floating in mid-air | Altitude mode set to "Absolute" but terrain changes. | Change altitude mode to "Clamped to ground." | Viewing in Google Earth Once exported, you can
Convert block references (trees, streetlights, manholes) to point placemarks in Google Earth.