Unanswered Questions
19
votes
0answers
534 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 ...
18
votes
0answers
246 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 ...
14
votes
1answer
282 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 ...
14
votes
0answers
745 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....
12
votes
1answer
198 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 (...
11
votes
0answers
484 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
108 views
Ice type differentiation using satellite data
I would like to classify glacial area by categories of snow (if there is) and ice, but what's most important: between old ice and fresh ice. They have different properties that are possible to ...
10
votes
0answers
417 views
How to fill composer map with canvas data and export composition as png using Python script in QGIS
I'd like to create a Python script in QGIS that will take some data (shp + tif, in my example), use tamplate Map Composer (from a file) and export created composition to a png image.
With almost no ...
10
votes
0answers
196 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 ...
10
votes
0answers
611 views
sql server spatial index performance
I have a table with around 2 million records in it. I create a spatial index, using the defaults other than the bounding box. I've been noticing that some queries are extremely fast, and some are ...
10
votes
0answers
335 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....
9
votes
0answers
133 views
Cannot find NATO UTM location in Sentinel-2
Regard coordinates 31.96212, -103.004715
UTM converters give it's UTM coordinates are 13/R/FR.
Example converter is here: http://www.rcn.montana.edu/resources/converter.aspx
But there are many of ...
9
votes
0answers
251 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 ...
8
votes
0answers
152 views
QGIS composer add attribute table with repeating columns
I need some help with QGIS composer. I use atlas composer and I try to use add attribute table from layout tab.
I have create my expression where I want to print in composer.
field expression (that ...
8
votes
0answers
151 views
Python: Break linestring based on condition
I have a geopandas dataframe of a bunch of linestrings that have some data associated with each vertex/point:
Point_x = (Lat, Lon, Time, ID, Data1, Data2, Data3)
The points are converted to ...
