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2d
comment Can I clip a geodatabase vector layer in QGIS?
What kind of polygon have you drawn? If it is just a graphic picture, then the Clip will not work, because it needs a polygon with the same real-world coordinates as the contour layer (as Freight_Train and Joseph have stated!). But if you create a GIS polygon layer (such as a shapefile) in the same coordinate system as the contour lines, then you could digitize ("draw") the polygon with the contours as a screen backdrop to help guide where the polygon boundaries should go. After saving the new polygon, it will be aligned in the same coordinate space as the contours, ready for clipping.
Feb
5
comment Is there an automatic function in QGIS to package all files in a project for transferability?
As of 2016-02-05 the QConsolidate plugin works correctly with shapefiles, tif rasters, and (!) Arc coverages. However, file geodatabase feature classes (as points) are not copied to the output folder.
Feb
4
comment Reclassify a raster based on proximity to other cells in the same raster
@FelixIP For the current project there will only be two values that need to be reclassified. However, I expect that there will be future projects where this type of reclass is required. My "and so on" was meant to reflect a sense of future utility.
Feb
4
asked Reclassify a raster based on proximity to other cells in the same raster
Feb
3
asked Unable to load Arc Binary Grids in QGIS
Feb
2
revised Arc Raster to polygon mesh?
deleted 1 character in body; edited tags
Feb
2
revised Arc Raster to polygon mesh?
deleted 1 character in body; edited tags
Feb
2
revised Arc Raster to polygon mesh?
added 3 characters in body
Feb
2
comment Arc Raster to polygon mesh?
@PolyGeo Done. Thanks for your time.
Feb
2
revised Arc Raster to polygon mesh?
Added my solution.
Feb
2
revised Arc Raster to polygon mesh?
Added my solution.
Feb
2
comment Arc Raster to polygon mesh?
@PolyGeo Thanks for keeping an eye on this question. I have developed my own answer to the question, so please take it off hold and I'll then post the answer. Thanks.
Jan
31
comment Arc Raster to polygon mesh?
@Vince you are correct, a polygon layer that large would run pretty slow. Your comments have forced me to rethink my needs. Actually, I only need the output mesh for display purposes, not analysis. So an output polyline mesh might run faster that a polygon mesh. In any event, I need a mesh that displays every cell outline, even if the resulting output runs slow.
Jan
31
comment Arc Raster to polygon mesh?
@PolyGeo are you proposing that I ask the same exact question twice, once for Arc and once for QGIS?
Jan
31
asked Arc Raster to polygon mesh?
Jan
31
comment QGIS Field Calculator functions
Thanks again. My quest started when I wanted to find the centroid (if that's the correct word...) for a polygon shapefile. Not the centroid for any one polygon, but the entire shapefile. I think that this x,y location would be the center of the shapefile's bounding box. That question led me to the field calculator's functions, where I became puzzled by the difference between x, $x, y, $y, etc. That's where the original question came from.
Jan
30
comment QGIS Field Calculator functions
Sorry, I ran out of edit time... Let's see if I understand. Say we have a polygon shapefile, named test123, containing 20 polygons. If I wanted to populate a numeric attribute field with the bounding box of each of the 20 polygons I would use: area(bounds($geometry)). If I wanted to populate the attribute field with the shapefile's overall bounding box area (I realize that the output value would be the same for all 20 records, but humor me!) I would use area(bounds("test123")). Is this correct?
Jan
30
asked QGIS Field Calculator functions
Jan
25
comment Why does an 32-bit FGDB raster have a smaller file size than 8-bit?
Thanks, I learned a lot!
Jan
25
accepted Why does an 32-bit FGDB raster have a smaller file size than 8-bit?