4

Situation: – In a student project, we are building a cataster/registry of pollard trees. – We have geolocations of many trees and now we want to collect data about these trees in the field. – We want to use open source software and lowcost equipment: an efficient solution, basically.

What we have: – We are using QGIS for analysis – We have tablets running Windows 8.1 and QGIS – Optionally we have external Bluetooth GPS sensors (but the tablets have internal GPS sensors as well)

What we are able to do: – Use a customizes QGIS with an entry form in the field, to gather attribute data (got that already)

Questions, what we are lacking: – Is there a good way to capture images of trees with the tablet camera in the field AND link them to tree data? Maybe a plugin or script or something? – Is there a way to get the tablet internal GPS sensor working with Windows 8.1?

7

This is a bit of self promotion but this is exactly what I built Roam (version) for.

Roam is built on QGIS with Python. It's a fully standalone Python application (apart from the making the maps for which you need QGIS installed).

EDIT Due to Windows 8 GPS and how it works you have to use a tool called centrafuse localizer into order to expose the GPS to a COM port. It's cheap and has worked for me.

enter image description here enter image description here

If you have your own application, you can see how I have done the camera stuff here: https://github.com/DMS-Aus/Roam/tree/master/src/roam/editorwidgets (It uses a third part lib vidcap.pyd with the Python wrapper)

  • As you responded, I have looked into your tool already… I am still wrangling with 2 things: 1. Windows 8.1 Location API does not provide COM Port, I guess, we have to use an external GPS Logger 2. Is there a way to register new points using roam? Could be, that people in the field discover new trees… – Lars Apr 18 '15 at 9:42
  • 1
    For 1. see edit, and 2. of course that is the whole point of it. Follow this: roam-docs.readthedocs.org/en/latest/admin-guide/projectadmin – Nathan W Apr 18 '15 at 23:35
  • @NathanW may I ask you about the tablet or ultrabook you are using and would reccomend? – Paulo Cardoso Feb 25 '16 at 15:11
1

Check out MapIt - GIS Data Collector

It is not dependent on any web or desktop applications; incoming and outgoing files for Mapit can cook and work in that geographic information system, which you prefer e.g. qGIS. Mapit has built a Form Designer: You can set the necessary fields and values ​​directly on the tablet or smartphone. Mapit able to import, create, edit and export points, lines and polygons; you can use the online service raster maps (eg, Google Maps or Open Street Map) or off-line tail cache; manager available flexible layers. Documentation is a simple but comprehensive and well illustrated…

MapIt - Main Functions Schema

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.