Hot answers tagged gps
Approach #2 seems to be the more comfortable one. You should have a look at natural earth data for a shp ( www.naturalearthdata.com/downloads/10m-cultural-vectors/10m-admin-0-countries/). Regarding the flight path I am not sure if it is always a straight line. You should consider that.
If all you need is combined background there is plugin for QGIS called GarminCustomMap to export map easily for Garmin devices which supports custom maps - series 62, 64 as defined here: http://www.garmin.com/us/products/onthetrail/custommaps There is also video tutorial on youtube how to use that QGIS plugin: https://www.youtube.com/watch?v=abffJeSj3zM ...
A common entry-level GPS has an absolute precision of roughly 40 feets, but there are many "tricks" that help improving this precision. For instance, you can collect several points of the same position and average this position (which is not a good solution if I understand well your case) or you can use WAAS enabled GPS. I see that you live in the States, so ...
I have never tried them myself, but it looks like the iScreenDisplay interface has rotation functions: iScreenDisplay Also check out screenDisplay.DisplayTransformation.Rotation() Might be a good starting point.
One example is if you are setting up an RTK survey, but don't have any permanent marks. In this situation, you set up a base station and observe for 6+ hours while you undertake your field work with a radio-connected rover (you might be able to do this disconnected?), then you can post-process to identify the coordinates of your base station. ...
First, RTK stations are not always available. There are some countries where there are no or little stations, and according to this source even in the US you have states without public RTK. So you then need your own base station and if you want to make you own RTK you need an emitter in addition to the GPS receiver, so this i more expensive. EDIT: for the ...
My favorite app for doing these kinds of things is Locus map free. It can import KML file amongst many other formats, and can work completely offline. If you need a base map, you can either download it within the app (for a fee) or add your own data either in mbtiles, or one of the other myriad formats that it supports.
One way of approaching this is with the following technologies: Server with PostGres/PostGis, GeoSever and a Web Server installed. (Could be a windows desktop machine using IIS) This will allow you to import the shape files and KML files into a database with geometries and create layers to present to the end user You will need to build tables of vehicles ...
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