Updated 2. Running OpenDroneMap (markdown)

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Dakota Benjamin 2016-06-16 14:48:13 -04:00
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@ -10,7 +10,7 @@ Then sit back, grab a coffee and wait
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# Running ODM with Ground Control
By default, OpenDroneMap tries to use the photo's GPS exif data to georeference. If your photos doesn't have GPS information or you want better accuracy you have to specify a ground control point file and use the `--odm_georeferencing-useGcp`. [This post has some information about placing Ground Control Targets before a flight](http://diydrones.com/profiles/blogs/ground-control-points-gcps-for-aerial-photography), but if you already have images, you can find your own points in the images post facto. It's important that you find high-contrast objects that are found in **at least** 3 photos, and that you find a minimum of 5 objects.
By default, OpenDroneMap tries to use the photo's GPS exif data to georeference. If your photos doesn't have GPS information or you want better accuracy you have to specify a ground control point file and use the `--odm_georeferencing-useGcp` parameter when running the script. [This post has some information about placing Ground Control Targets before a flight](http://diydrones.com/profiles/blogs/ground-control-points-gcps-for-aerial-photography), but if you already have images, you can find your own points in the images post facto. It's important that you find high-contrast objects that are found in **at least** 3 photos, and that you find a minimum of 5 objects.
For example, in this image, I would use the sharp corners of the diamond-shaped bioswales in the parking lot:
![Toledo sample image](https://raw.githubusercontent.com/OpenDroneMap/OpenDroneMap/master/tests/test_data/images/1JI_0064.JPG)