Make a QGIS workflow to generate posters using geotiff output files

[goatchurchprime]

No longer need to make backgrounds in tunnel with poster views, do it all in QGIS. Use tunnel only to generate the overlay of the cave survey at various renderings (close up colour or inksplot for big scale overview use)

Post this workflow into the wiki on this page https://github.com/CaveSurveyGIS/CUCCexposurveyissues/wiki/Expo-tunnel-workflows

[wobrotson]

I can do the GIS but only if I can work out how to do the pull and commit to and from the website to get the data.

[BeckaLawson]

Not online

[goatchurchprime]

The generated GEOTIFF files are in http://expo.survex.com/expofiles/geotiffsurveys/ . This contains the publicly accessible 10m lidar data for our area.

(Ask me for access if you need the 1m lidar data. As this is 1.1G, someone should trim this down to a generous rectangle around our area and reupload it as a smaller file.)

The way to generate geotiff files is given in: https://github.com/CaveSurveyGIS/CUCCexposurveyissues/wiki/Expo-tunnel-workflows

See some good examples of work here: http://expo.survex.com/expofiles/geotiffsurveys/qgis-examples/

[goatchurchprime]

The basic components would probably be some Print composer template for the main frame (of several pieces), and some good contours and renderings of the lidar elevations too, with colour schemes.

(I am not a GIS expert and don't have time for it right now, with people who do it for a living. However, I'm quite keen on putting in some automated features into tunnel to facilitate outputs of the necessary files, to replace the frame poster generating features.)

This is the first year we have access to the 1m lidar data, so something should be made of it. I'd like to see QGIS used as a tool for planning surface prospecting and cave entrance approaches as heavily as we use Aven for working out where to look for cave connections. We should have databases of GPS walking tracks overlayed on it and be able to see each step of the walks. We can have shapefiles defining the surface pits and cave entrances, rather than single GPS points.

[goatchurchprime]

We should endeavor to have a geotiff image for every part of the cave system that can be dragged into qgis. This includes requesting this from the stellaweg cave resurvey.

[goatchurchprime]

All major tunnel files have been geotiffed and appear in the correct places on the 1m lidar data

[goatchurchprime]

I've put in a workflow here to get the basics up: https://github.com/CaveSurveyGIS/CUCCexposurveyissues/wiki/Expo-tunnel-workflows#making-a-qgis-map