Unanswered Questions
21
votes
0answers
1k views
Clustering of multiple raster layers to create sub-regions using QGIS?
I'm attempting to create n sub-regions from a polygon based on a cluster analysis of a bunch of overlapping raster layers (physical layers, eg: depth, currents, waves).
Currently, I can create a ...
19
votes
0answers
345 views
Development of a plugin which depends on an external Python library
I'm developing a Python plugin, the target is integrating into QGIS the functionalities of a PyPI Python library called 'elevation'.
Is there an OS independent way of installing external Python ...
15
votes
0answers
333 views
Joining layers with respective elements with PostGIS Topology
I'm currently using PostGIS topology extension, but I have some difficulties in understanding how the structure works:
One of the key points is the use of "layer"s: as of what I understand, features ...
11
votes
2answers
117 views
Iterating over conflicting labels
The way I see it, if two features to be labeled are too close to one another, then there are essentially three options. By default QGIS will omit one of the labels. If I enable the “show all labels” ...
11
votes
0answers
146 views
Perform QGIS modeler multiple raster calculations with data from external CSV
I need to perform multiple calculations on a set of rasters based on values in a CSV metadata file.
I'm using the QGIS graphical modeler and can call a specific field in a CSV with the Table and ...
11
votes
0answers
201 views
Is there a way to pause WMS layer auto refresh in OpenLayers 3?
I have an application which has to perform a HTTP request (which will handle some map transformations) before fetching WMS tiles from server.
Is there a way to pause TileWMS auto-refreshing after ...
10
votes
0answers
213 views
Customizing ISO 19139 metadata profile in ArcCatalog?
I'm using the ISO 19115/19139 metadata standard, and I need to convert some optional elements into mandatory elements. Is it possible to achieve this using ArcCatalog as the metadata editor?
About ...
10
votes
0answers
128 views
What's the binary format of ENVI (Classic) ROIs?
I'm a Pythonist in an office full of ENVI/IDL users. I've created some tools to help bridge the gap, but one big stumbling block is ENVI Classic .roi files, which my colleagues use a lot.
I can ...
10
votes
0answers
386 views
Frontal Detection of sst & Chlorophyll image
I am working on sea surface temperature satellite images and looking for delineating gradients in open source on the basis of temperature. Is there any tool like Cayula and Cornillon front detection ...
10
votes
0answers
231 views
Postgis database query optimisation
I have a set of rasters in DTED format which I load into PostGIS database using raster2pgsql command line tool.
Each of rasters is simply stored in a row and described by rid and a value of raster ...
10
votes
0answers
607 views
How to convert a raster (array) to a NetworkX graph and do a * search?
I want to use a slope-raster for a a_star path analysis in NetworkX.
I am using Python for this project.
My test raster looks like this
First I read in the raster with GDAL
input_raster = "slope5....
9
votes
1answer
250 views
How to sync a FeatureTable with a FeatureLayer's selection set?
The ArcGIS Server JS API contains a new FeatureTable class, which shows the attribute table corresponding to a FeatureLayer. There is an option syncSelection which:
Enables an interaction between ...
9
votes
0answers
143 views
Null values in Geographically Weighted Regression Analysis
Some of my explanatory variables have a few null values for certain polygons.
Can Geographically Weighted Regression Analysis handle these, or should I remove the whole polygon and all data (...
9
votes
0answers
177 views
Servers that implement OGC Geo/Time OpenSearch
The OGC is has published the "OpenSearch Geo and Time Extensions". That specification is based on, but extends, the OpenSearch Geo extension and OpenSearch Time extension.
As it turns out, I'm ...
9
votes
0answers
311 views
Why do file geodatabase and SDE readers produce different fme_geometry types?
I have one very simple workbench that I am running against both SDE (9.3) and FGDB (10.0) sources.
I noticed two different fme_geometry values for same type of objects.
For the first one, i.e SDE 9....
