Tag Info

Hot answers tagged

4

It seems that you must use the Dissolve tool, based on a common attribute. http://resources.arcgis.com/en/help/main/10.1/index.html#//00170000005n000000


4

You can use QGIS' Delimited Text Layer support to add the layer to the map, at which point you can right-click the layer and select 'Save As...' to convert to Shapefile or other supported formats.


3

You are probably looking for the Define Projection tool (under Data Management, Projections and Transformations). Unlike Project, which will transform from one coordinate system to another (e.g. -119.789° becomes some large number of meters), Define Projection changes the coordinate system for the data itself and is appropriate to use when ArcMap is ...


3

You cannot clip a vector file with a raster file. So you need to convert your raster to polygon first. In ArcGIS, you can use "raster to polygon" from the Conversion toolbox (no need for an extension). The problem is that you first need to create the mask, and there is no built in tool in ArcGIS without spatial analyst. So this step has to be done in ...


2

You can use the Freehand editing plugin (not to be confused with the trace edit tool). Get this by installing it through the plugins menu option. Another option would be to use edge detection in the Processing toolbox (Have a look at tools in GRASS and Orfeo. SAGA maybe has one too I forget). The downside of this is that it will detect all edges. What I ...


2

If you do have ArcGIS and no SA: you might consider converting to points, deleting the values below 12, making the rest of the values a single integer, convert to raster, and then converting to polygon.That polygon would be used in the clips and advanced drawing layer masks, I tested this on an SRTM, and it worked well: import arcpy from arcpy import env ...


2

Thanks @whuber for pointing me in the right direction. I found my answer here. I had to reproject the raster layer into World Mercator (EPSG 3395), and then load it back onto my map where OTF reprojection put it in the right spot. I tried Pseudo Mercator (EPSG 3857) and that seemed to work too.


2

I'm told that in the upcoming QGIS 2.6 when joining multiple layers via the JOINS option (Layer Properties > Joins), editing the attributes of one layer will immediately update the attributes of the joining layers so basically in real-time. If this is the case then you could create a duplicate of the same layer, save it as another shapefile, edit its ...



Only top voted, non community-wiki answers of a minimum length are eligible