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  • 37 votes cast
Aug
24
comment How to refine a gpx track and set additional points on existing road network?
It is just an idea, but you can export the gpx track to a shape file, then densify the lines (vector/geometry tools), then export the shape to gpx again.
Aug
5
comment Does QGIS 2.10 work with Windows 10?
I have two computers with Qgis 2.10 and windows 10. One did have it already before making the upgrade to win 10 and I do not have any problem with it. The other one is an installation by OSGeo4w after the upgrade. The only thing that happened with this one is that it froze while after updating mmqis with the plugin administrator. No problems opening projects or working with them so far. The installation on both machines is a 64 bits one.
Jul
20
comment Running LAStools on QGIS 2.8
Check this rapidlasso.com/2013/09/29/…
Jun
26
asked How to format the labels of a UTM Grid in a map Layout/Print Composer
Jun
22
comment extract x-y from a point created from lat/lon coordinate
I think, if your data is on lat lon, EPSG 4326 (lat lon wgs84) for instance, you must reproject it to 32634 (UTM 34N WGS84). You can do this by selecting the layer and choosing save as and defining the new crs. The resulting file will be a shape file where you can use the field calculator to extract the $X and $Y coordinates. Now you can export the table as a CSV file that you can open with a spreadsheet, Excel for instance Hope it helps Gerardo
Jun
10
answered How to fill a hole - with islands within?
May
29
awarded  Popular Question
Apr
20
revised How to properly get the slope from an ASTER DEM in QGIS?
edited body
Apr
20
answered How to properly get the slope from an ASTER DEM in QGIS?
Apr
20
comment How to properly get the slope from an ASTER DEM in QGIS?
Aster DEMs are in lat lon WGS84 (EPSG4326). In order to calculate the slope correctly you must define the "ratio of vertical units to horizantal units" as 111120. For more information look at this answer gis.stackexchange.com/questions/95337/…. Although it is meant for hill shading, the parameters mentioned also afect slope calculations. In order to work with a CRS in meter you must reproject the original file using raster/projections/warp (reproject) not what you describe in your comment
Apr
5
comment Which UTM zone to use for a large country?
Being near the equator also matters since it does have a double false value to asign the north value. For features north of the equator its false value is 0 meters. For features south the equator its false value is 10,000,000 meters. In your case, you have both cases, areas to the north and south of the equator making the use of a UTM CRS a little bit problematic
Mar
19
comment QGIS georeferencer: Thin Plate Spline (TPS) residual
In my experinece yes, I expermented with lineal, helmert polynomial and Thin plate spline with the same image and control points. For reference I created a UTM vector grid using mmqgis. Then I compared visually the vector grid and the utm grid in the georeferenced images and Thin plate spline aligned perfectly. What I did also was to define the control points in utm to define a square area (4km x 4km)
Mar
14
comment Microsoft Visual C ++ Crash when Install qgis.2.8.1
I have the same issue on a machine. My OS is win 7 64 and I have tried with the stand allone or OSGeo4w 64 bits installers. I know about this thread gis.stackexchange.com/questions/72506/… and this one also stackoverflow.com/questions/14552348/… but I have not been able to solve the issue
Mar
8
comment How to automatically convert dots on paper maps to vector points?
I think that you have to create a new vector layer (shape for instance) and capture your points manually...
Feb
11
comment Buffering in km in NAD83 QGIS
you have to reproject to a CRS that handles meters as a measuring units for the coordinates, and that preserve the NAD83 datum
Feb
3
comment Calculate shortest path not on land but over sea
The main problem is that the navigation routes I have to calculate consider boats for time periods before the arrival of Columbus to America...
Feb
2
asked Calculate shortest path not on land but over sea
Jan
21
comment How do I make a SHP file from waypoints?
You are right, nevertheless the gpx folder in my unit shows several gpx files, which can be confusing, the advantage of using EasyGPS is that shows all the information living on your gps unit at once. You can even select and delete things that you do not want in your final gpx file.
Jan
20
revised How do I make a SHP file from waypoints?
added 189 characters in body
Jan
20
answered How do I make a SHP file from waypoints?