Re: [Qgis-user] compute spatial derivatives from raster bands

2018-12-29 Thread Micha Silver
If you're wiling to try GRASS GIS, then the module r.slope.aspect can output E-W and N-S derivatives using the dx= and dy= output parameters. See: https://grass.osgeo.org/grass74/manuals/r.slope.aspect.html On 12/29/18 7:37 AM, Lee Eddington

[Qgis-user] categorize using postgis hstore

2018-12-29 Thread wambacher
Hi, i'm using QGIS 3.4 on ubuntu and want to categorize some data using hstore. i was told (*) to use *map_get(hstore_to_map("tags"),'entrance')*, but that does not work (for me). the result is ony one category for all nodes. sql: select osm_id,tags->'entrance' "tags->'entrance'"   from

Re: [Qgis-user] how to properly reference longitude values in different datasets

2018-12-29 Thread Saber Razmjooei
Hi Lee, I had the same issue: https://github.com/lutraconsulting/MDAL/issues/66 Could you open a ticket for GFS and an example file? Regards Saber On Sat, 29 Dec 2018, 00:16 Lee Eddington Coming back to this…I did some reading on MDAL and tried the instructions > found at: > >

[Qgis-user] exporting QGIS maps to gps for field work

2018-12-29 Thread Rutger Emmelkamp
Hello everybody, I’m fairly new to QGIS but I’m loving what I’ve encountered so far. What I wish to do now is adding information layers to scanned geological maps and then export them to my Garmin gpsmaps 64s so I can work with the maps in the field. What would be the way to do this? Is it

Re: [Qgis-user] compute spatial derivatives from raster bands

2018-12-29 Thread Alessandro Pasotti
Hi, QGIS core (the analysis library) do not expose such function directly, but it does have methods to compute derivatives that are internally used by all the "9 cells" algorithms (slope, aspect, ruggedness and hillshade) and the derivative calculation is accelerated by OpenCL if available,

[QGIS-it-user] Plugin XY Tools praticamente core in QGIS 3

2018-12-29 Thread Marco Spaziani
Qualche post fa mi lamentavo di non ritrovare in QGIS 3 quei plugin di QGIS 2 che per me erano dei must insostituibili, tipo Numerical Digitize o XY Tools. Per Numerical Digitize ho subito trovato un degno sostituto, il plugin Lat Lon Tools, che fa tutto e di più di quello che faceva Numerical