Does your data...
- Require geocoding? Correcting a map marker that has geocoded incorrectly
- Provide lat-long coordinates? Troubleshooting inaccurately placed points
- Provide lines or polygons? Troubleshooting misaligned shapes
Correcting a map marker that has geocoded incorrectly
Sometimes it's not obvious where to put a location on a map. Did you know that there are 70 cities in the United States alone named Springfield?
Each row in the table is geocoded separately. Even if you know the entire table is about one place, the geocoding service doesn't.
Edit the location
To improve geocoding, include as much as possible of the location description within the cell. This may mean including the state, zip, or even country in the location text.
After editing, choose File > Geocode to manually recompute the location on the map.
Move the pin
You can also correct the location of a specific point yourself:
- In your table, find the row with the wrong location. The address field is likely to be in yellow.
- Double-click the row to bring up the editor dialog.
- Click the "edit geocode..." link below the address field.
- The current location is shown with a green arrow.
- To change the geocode:
- Search with any text until you see a red map pin located in the correct place.
- Click the red pin, and then click "Use this location."
- Click "Save" in the editor dialog.
- Your table will now use the new pin's location.
Troubleshooting inaccurately placed latitude-longitude points
Here are some items to check when the location markers on the map don't appear to correspond with the latitude / longitude coordinates provided in the table.
- Be sure to use decimal degrees, not degrees-minutes-seconds.
- Check the latitude and longitude columns are assigned correctly within the "Two column lat-long" column type.
- Check the signs are correct on the lat-long points.
Troubleshooting misaligned lines or polygons
Polygons or lines that appear misaligned to the map may be in a different datum. Like all other Google mapping tools, Google Fusion Tables assumes the WGS 84 datum. If your location data is in a different datum, convert it before you import it for the most accurate mapping.