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-1

This should answer your question: https://infrastructurecommunity.schneider-electric.com/docs/DOC-7197


3

I would say it's more of a math thing. GPS uses trilateration to calculate location. You need four satellites to get a proper position and my guess is that GPS units don't show anything until the minimum requirements have been met. So, that's an all or none affair, rather than piecemeal like you are suggesting. I think that's especially true since one of ...


3

From a cold start to obtain a lock to satellites, GPS needs to download coarse orbit information about all satellites (almanac). At the rate GPS navigational signal is transmitted, it will take 12.5 minutes to download the entire almanac. There are some improvements that can reduce this time, e.g. based on location obtained through cell phones, among other ...


1

You may click on some automatic tie point (the one you want to assign the elevation to), and then click: After clicking the correct position on more than 2 images, the coordinates will be displayed in the up-right. Change the point type from "manual tie points" to "3D GCP" and then change the elevation value. Repeat this for 3 points, well-distributed on ...


0

When you say GPS i am assuming you mean in a state plane or utm? I would suggest creating a php webpage using the proj4 library. You can create a php/js page that will allow the input of N,E points as a single point entered by the user or in a batch of points in csv format and it will output it the lat/long coordinates. I have a webpage that can be found at ...


0

Llaves mentioned GPSFileDepot as a good place to figure out how to do what you're asking. The tutorial he is referring to has just been updated and now includes steps using QGIS to take data sources, do the processing necessary to convert them for Garmin, and then compile them into maps you can install on your GPS. The new tutorial with QGIS included is ...


1

I'd recommend to interpolate points on the finish line for all tracks/cars. I'd use a simple linear interpolation, knowing this will also introduce more errors, depending on the track geometry around the finish line. See this example: =========+====== > A + B > =========+====== > Cars travel left to right. There are 8 segments ...


1

Another option is CommCare. CommCare is designed to give organizations the flexibility of building mobile apps tailored to their programs. This can include data collection, client registration and tracking, behavior change counseling, and much more. CommCare supports complex workflows, longitudinal client tracking, multimedia optimization for low-literate ...


4

You can use org2ogr to convert CSV file to GIS format, e.g. Shape file. Shape files are not the best solution if you would like to write and read the same file, they will block each other. You had better to use PostGIS database. AFAIK the best solution would be: from your Raspberry send the actual coordinates to a web server where a PHP/Python/whatever ...


5

The easiest way to see these updates as changes are made to the csv is to use the "Add Delimited Text Layer" button and choose "watch file" as one of the options. I noticed with the spatial index feature enabled, it doesn't update the layer extent (so the zoom to layer button doesn't do what it's supposed to) or the index as new features are added, so maybe ...


0

I'm going to jump in late as the map is very cool (I'll use it as a resource) but I am not sure it actually answers the question correctly (in a technical manner) despite all the upvotes. I think the question and answers are confusing the maps, the gps, and even orbital oscillations of the planet in relative space or about an axis. The Sendai earthquake ...


2

3 Satellites indeed provide 3 equations, not for hyperboras but for hyperboloids. Whenever 2 hyperboloids intersect, there generates a curve. Thus, it appears that 3 satellites are enough that generate 2 curves that meet at a point. However, there are special cases where the 2 curves are identical. That is why we need one more satellite to resolve the ...



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