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The accuracy of a GPS device is no different in Saudi Arabia than anywhere else in the world. Perhaps the availability of augmentation systems such as WAAS in the U.S. or EGNOS in Europe can enhance the accuracy to a certain extent. But if the manufacturer states that the device can achieve a 3m accuracy then it's probably what you will get 90 or 95% of the ...


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The video files recorded with garmin dash cam 20 are RIFF AVI files . There is a GR20 chunk in the file which contains sequence of 36 byte length binary data. Each 36 byte is about a frame, in this order: bytes |type |description ------+--------+---------------------------- 0-4 |int32 |Frame number 6-8 |int16 |Speed in Km/h 8-12 |int32 ...


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I tried out that GarminCustomMaps extension and then studied the "Garmin Custom Maps" format. The extension is not flexible. First I considered improving it, but then realized that the Garmin format itself is so limited that it's not worth the effort If you have a supported Garmin device, you might want to consider working with the JNX (Birdseye) format ...


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I assume the whole planet file is just too big for mkgmap to process, so for a worldwide basemap you would be better off to filter the data before processing. It might be a better idea to get a worldwide dataset from Natural Earth and convert it to OSM format for mkgmap processing. BTW the lower zoom levels of openstreetmap.org are not rendered from the ...



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