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4

If the area is known and stationary, why not skip GPS altogether and use beacons? You can get accuracy up to a few inches using that approach. As of today, there are many software+hardware SDKs that are coming out that enable you to pinpoint location using fixed beacons and a local coordinate system (which then you can translate to a different coordinate ...


3

I did a presentation a few years ago where I developed a tool to take GPX points and create a line featureclass by rows where the speed is indicated as an attribute. You can symbolize the output by that field in ArcMap. Natural breaks seems to symbolize it well. I just uploaded the tool to arcgis.com, you can download it here. After you get the line, you ...


2

The only thing external would do is get it a bit higher and away from any blockage of your body/ground elements when holding it. The antenna might be more sensitive/better design (re Michael's comment about reception), but since your primary obstruction is even farther overhead than that it's unlikely to make any difference. And the unit's signal processing ...


2

I think JasonT is on the right track (excuse the pun). Note, however, it is the concept of a buffer that you want, not to actually create a buffer. If you were using PostGIS (or similar software/libraries), you'd use ST_DWithin() to reject public road points that are too close to your GPS points.


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Although both applications are developed by Trimble, the online one is more up-to-date than the desktop one. More specifically, the desktop version uses the so-called almanacs to predict the satellite position (thus their viewing direction in the sky), so please make sure you have the latest ones installed. Secondly, please make sure the settings are the ...


1

I'll assume your street line layer is already divided up into individual line segments. As I originally mentioned in a comment, those GPS tracks appear to be rather detailed and it might be worth Generalizing them as a first step. This should reduce processing times significantly, but you need to strike a balance between extraneous vertices and being able to ...


1

If you're using just a mobile phone, I don't think you would be able to get much more than that unless they support some form of differential correction or post processing. I haven't heard of that support in mobile phones yet. GPS units that collect that type of info (in my experience) are generally rather large and may weigh as much and be as big as ...


1

So after some research I decided to stick with the OSM metadata. I found the Overpass API, which is basically a query language, which I managed to understand reading this: http://wiki.openstreetmap.org/wiki/Overpass_API/Overpass_QL and testing it here http://overpass-api.de/query_form.html I ended up with this query: way ...


1

Google maps roads API can do that, if a non-OSM solution is ok with you. See snapToRoad method which returns the GPS points snapped to the nearest Road. You can take the place id from the response and use Google Maps Places API to get corresponding Road name. https://developers.google.com/maps/documentation/roads/snap


1

Assuming you are using the TerraSync software for capture, page 240 of this TerraSync Operation Guide pdf seems to outline the procedure you need to use. Digitizing Digitizing is the process of creating positions for a feature by selecting points on the map, instead of using GPS positions. A line or area feature can contain both GPS and ...


1

I'm not aware of any empirical studies, but my view is that smartphones are a better option than handheld GPS devices. Many smartphones these days support both GPS and GLONASS, and they support modern data capture applications, such as Fulcrum. Couple a smartphone with a bluetooth GNSS device, from Trimble or others, and you have a pretty damn good ...


1

Unless there is a WAAS capable or not distinction (or similar error correction), consumer units aren't likely to vary enough, or rather be accurate enough, even with new tech to warrant an upgrade. That said, newer chipsets can potentially achieve locks faster, have better signal processing, or have better antenna designs. The units themselves may also ...


1

I Made a tutorial for my blog to help out with this. This uses the Garmin BaseCamp Software which is free to use. I cover how to join tracks, edit unwanted data out of tracks and how to reduce file size by filtering out unnecessary points. I hope this helps! http://outdooroutlier.blogspot.com/2015/05/how-to-edit-gpx-data-to-make-useable.html


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Positioning: only gives information about receiver coordinates.No information about enviorement Localization: gives information about receiver coordinates and also enviorement. positioning is a subtopic of localization additionaly GPS(Global Positioning system): is a positioning system (also a localization system) and gives coordinates of receiver ...


1

I posted a python script to use from ArcGIS here: Exporting 3GB ArcGIS Raster to KML without losing resolution? KML is uncompressed KMZ. The output here will work in either application. Georeferencing the scans could be done any number of ways; write a world file manually, use software. You can do it in Google Earth. But I feel the interface is very clunky ...



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