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1d
comment Project from Datum Nad27 to WGS84
I know you are usin Qgis, but I checked the transformation information in ArcMap. According to this es.scribd.com/doc/2618870/ArcGIS-Transformations for ArcMap you have to use NAD27 to WGS84 transformation 2. In this document: resources.arcgis.com/en/help/main/10.1/003r/pdf/… at page 53 the parameters for ArcMap´s NAD27 to WGS84 transformation 2 are the ones I mentioned before
1d
comment Project from Datum Nad27 to WGS84
The parameters for Nicaragua should be: +proj=utm +zone=16 +ellps=clrk66 +towgs84=0,125,194,0,0,0,0 +units=m
2d
comment Project from Datum Nad27 to WGS84
You have to choose the layer, right click and choose save as. You have to define the new crs in your case 32616. Keep in mind that depending on the region of your map you have to know also the parameters for datum shift. Check this: earth-info.nga.mil/GandG/publications/tr8350.2/wgs84fin.pdf and look in appendix b the parameters for the region you want to make the reprojection
2d
comment Using Google Maps plugin in QGIS?
I have the same problem only with google layers, not openstreetmaps or bing layers
Nov
20
comment How to draw coordinates QGIS print composer?
Do you want to add a measuring grid and/or graticule? If so, look at this: gis.stackexchange.com/questions/122693/…
Nov
20
comment QGIS raster symbology problem in 2.6
try to load the actual min/max values and then apply your color palette. Go to the layer proprties, style tab, and then in the load min/max values choose min/max and in the accuracy section choose actual and chose the load button. Then apply the color pálette of your choice.
Nov
19
comment How to merge DMAs using QGIS — Creating Custom Regions?
Chek the geometry of tha layer, that could be a problem
Nov
13
comment How do I select a point imported from a GPX file?
The only possible way to edit a gpx file is convert it to and editable format such as shp.
Nov
10
comment WMTS Geoserver 2.5.2 - QuantumGIS
Do you know the version of the server? For instance INEGI ask to define vms versio 1.1.1, . I am able to use it by adding ?VERSION=1.1.1 to the URL of the server. For instance: gaia.inegi.org.mx/NLB/mdm5.wms?VERSION=1.1.1
Nov
10
comment Reclass in QGIS?
Try to load the classified layer manually. That happens to me when I choose to "open the output file after running algorithm". I simply avoid this step and load tha later manually. Hope it helps
Nov
3
comment Print composer in QGIS 2.4: Grid interval settings crash before changing values
The grid you are trying to draw is way to dense, since you are asking q gis to draw it ¡each 10 meters! Do you need xy axis each ten meters?
Nov
3
comment QGIS Problem in calculating the distance of points from line
This can be usfeful but you have to convert the line to pints first qgistutorials.com/en/docs/nearest_neighbor_analysis.html
Nov
3
comment QGIS Problem in calculating the distance of points from line
May be this can help you gis.stackexchange.com/questions/28038/…
Oct
31
comment QGIS Problem in calculating the distance of points from line
Did you reproject your data by saving as a new shape file? Usually people tend to think that changing the crs in the layer's properties reproject the data. To do it correctly you have to select the layer and choose save as. In the dialog box you have to define a new name and the new coordinate system
Oct
31
comment QGIS Problem in calculating the distance of points from line
I think the results are in decimal degrees since the crs of your layer is lat-lon. Try reprojecting your layers to a crs that uses meters (for instance) as the measuring units of the coordinates. Try a UTM CRS of the area of your data, for instance
Oct
31
comment QGIS Problem in calculating the distance of points from line
In which CRS is your data? Why the results seem to be absurd?
Oct
6
comment How to snap and move circles by the center?
I do not know if this could help, but have you tried CADTools plugin?
Oct
6
comment Plotting NAD83 zone 8 points atop OSM or Fusion Tables
The UTM Coordinate system has UTM zone identifiers. Your point lies on UTM zone 8W. This nomenclature is not used in GIS. UTM coordinate system has two flase origins for the North coordinate. If something is above the equator the false origin is 0 meters. For something south the equator false origin is 10,000,000 meters. UTM CRS in GIS applications usually only care about if something is north or south of the equator. Also bear in mind that you are using a datum that is intended to be used in North Aamerica, so you will have just a NAD83 UTM zone 8N and not a 8S based on the same datum.
Oct
3
comment How to snap and move circles by the center?
If your points have to be in the center of the buffers you can calculate the centroid of the buffers (vector, geometry tools, polygon centroids). That will give you a shape layer with the center of each buffer. Later you can move the desired points to the center of the buffer as described before.
Oct
2
comment Is there a union function for multiple layers comparable to ArcGIS in open source GIS like QGIS?
The merge shapes in to one function works for more than 2 shapes. I have been able to merge more than 20 at once.