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Dec
4
comment Reprojecting between NAD27 and WGS 84 part III
I want to let you know that the online tool works for points, nevertheless they have a paid product called IRIS that could work to transform layers, not only point by point between nad 27 and other coordinate systems. This product is a spatial information visualizer with some GIS capabilities. I was fortunate to grab a copy of it and I will make some experiments with it.
Dec
4
comment Reprojecting between NAD27 and WGS 84 part III
The INEGI (TRANINV) on line tool works to make translations between NAD27 and ITRF92, I get 500029.111572mE, 2100624.194940 mN. The difrerence is about 3m. The article you mention has a 7 parameter transformation but for ITRF92 epoch 1988.0 and NAD27. In the thread they say there are no known parameters for transformation between ITRF and WGS84.
Dec
4
comment Reprojecting between NAD27 and WGS 84 part III
First, thanks for your time, and I just want to tell you that I checked the EPSG registry and the parameters are he same as the ones in the links mentioned above. So in this sense I will mantain my custom crs to make transformations between NAD27 and WGS datums
Dec
3
comment Reprojecting between NAD27 and WGS 84 part III
The same info here iho.int/iho_pubs/standard/S60_Ed3Eng.pdf
Dec
3
comment Reprojecting between NAD27 and WGS 84 part III
I get the values from earth-info.nga.mil/GandG/publications/tr8350.2/wgs84fin.pdf appendix B.6-5., es.scribd.com/doc/2618870/ArcGIS-Transformations and resources.arcgis.com/en/help/main/10.1/003r/pdf/… page 53. As you can see the parameters I mention are only valid for Mexico
Dec
2
comment CRS reprojection
take in to account this: gis.stackexchange.com/questions/123069/…
Nov
27
comment Misplaced Google Maps with OpenLayers plugin in QGIS?
unibasil solution works
Nov
25
comment What is the fastest way to digitize features on a map?
The only partial solution I know is a paid one, R2V...
Nov
24
comment QGIS 2.6. How to move labels with “easy label engine” tool
Also This:youtube.com/watch?v=4c0m-0X281o and youtube.com/watch?v=sXK_0eEH3hc
Nov
24
comment QGIS 2.6. How to move labels with “easy label engine” tool
Try this:sourcepole.ch/new-label-tools-in-qgis .
Nov
22
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
Nov
22
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
Nov
22
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
Nov
21
comment Misplaced Google Maps with OpenLayers 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