4
votes
0answers
1k views

FeatureLayer SaveEdits failing

I've created a layer which I have bound a DataFeatureForm. Everything is working hunky dory, up to the point where I try to call the layers SaveEdits method in the EditEnded event. When I call this ...
4
votes
0answers
627 views

Why doesn't the gml 3.1.1 schema validate with xmllint?

Running xmllint on the gml 3.1.1 schema fails, even though the release notes claim that this release was created to get the schema to validate using 'common tools'. There's questions about this on ...
4
votes
0answers
385 views

Bad data beaking IRelationshipclass.GetObjectsRelatedToObjectSet

I have two workspaces - one a File GDB, the other SDE (SQL Server). Both workspaces contain the same data with the same relationship classes. When identifying features in ArcCatalog, the results ...
3
votes
0answers
15 views

Is there any way to capture ArcMap Drawing Errors inside of a python script?

Is there any way to capture ArcMap Drawing Errors inside of a python script? Through python, I would like to iterate through each layer inside of an MXD, make the layer visible, refresh the table of ...
3
votes
0answers
31 views

How to create a shapefile having Voronoi diagrams from the shapefile of an existing region?

I have a shape file of a region and I want to generate random sub regions of that shape file using Voronoi class of scipy.spatial package of python. But I am a newbie to GIS. I found out about Voronoi ...
3
votes
0answers
29 views

QgsSpatialIndex partial or complete overlap

I'm working on adding some functonality to a QGIS plugin. It currently uses a QgsSpatialIndex to efficiently compute whether the features of a vector layer intersect (potentially millions) of ...
3
votes
0answers
40 views

Postgis sequence in QGIS not working

I have a Multipolygon-Layer stored in a Postgis-database. The primary key field 'gid' is SERIAL. When trying to add a new polygon in QGis (LYON 2.12.1 on OSX El Capitan), the attributes form shows me: ...
3
votes
0answers
22 views

How to calculate false easting/northing for Lambert Conformal Conic projection

I'm defining a new GRASS location using the Lambert Conformal Conic projection. My understanding is that the values for the standard parallels and central meridian are dependent on my area of ...
3
votes
0answers
34 views

Add Shapefile code - Why all shapefile features added on the same location on map?

I am developing the JS app using 3.15. I have tried this code in my app Add shapefile from the esri samples. but shapefile features added at the same location on map.If the polygon features it ...
3
votes
0answers
28 views

How to assign polygon attributes to grid cells using centroids in QGIS?

I am relatively new usign QGIS but have realized it is a great tool. Unfortunately I can´t figure out the following yet. I have two polygon shapefiles, one is a grid I have created using QGIS ...
3
votes
0answers
24 views

r.sun from QGIS toolbox doesn't give realistic value about the hours of insolation

I have a problem with the GRASS module r.sun when I run it in QGIS. I would calculate the hours of insolation in a specific site during a specific day. When I ran the algorithm "r.sun" from GRASS, it ...
3
votes
0answers
31 views

How to calculate average value of a raster, that is clipped by multiple polygons?

I am using QGIS 2.12.0. I have a raster of coherence value (SAR interferometry) and a land use shape. I wish to calculate mean coherence value for those areas with a specific land use. I split land ...
3
votes
0answers
28 views

Choosing interpolation method for monthly atmospheric parameters derived from AQUA/Air satellite?

I want to investigate atmospheric refraction and i am using Aqua/ Airs satellite data. These are atmospheric parameters (1) Air temperature (2) Geopotential height (3) Relative Humidity All these ...
3
votes
0answers
31 views

How can Ripley's K Function output in ModelBuilder be used as the search radius for Kernel Density analysis?

I am using ArcGIS 10.3.1 (Basic license). The first part of the model takes point data, runs it through Ripley's K Function tool, sorts the data in descending order by the DiffK column, and then ...
3
votes
0answers
32 views

How do I handle heading in UTM coordinates?

In a nutshell: Given a standard (angular) GPS measurement and heading, relative geographic north. If i take my GPS coordinates and turn them into UTM coordinates, do I also have to convert my heading? ...
3
votes
0answers
23 views

Open source alternative to the “Contours with Barriers” Tool in ArcGIS

I am trying to create a contour file for the globe for a project and am using open source GIS software packages. I was trained for several years on ArcGIS and there is a tool to create contours with ...
3
votes
0answers
36 views

How to remove black pixels in Landsat image

Does anyone know how I can remove these black pixels around the edge of this Landsat image? They appeared when I layer-stacked the bands in ERDAS IMAGINE - they were not there in the separate band ...
3
votes
0answers
34 views

Building a DEM with both a raster and vector points

So I'm struggling here, trying to get a decent DEM for the Azores Islands because I want to include bathymetric data on it. I have a raster with elevation for the islands (land) with a 30 meter ...
3
votes
0answers
44 views

Using original Landsat multispectral image or pan-sharpened image in land cover classification?

I am currently creating land cover maps of a number of national parks across Asia from Landsat 8 imagery and also later from SPOT imagery. I plan to use supervised classifications in ERDAS IMAGINE and ...
3
votes
0answers
56 views

Python script to automate saving satellite images for different combinations of lat longs

PS. : This is my first try at a GIS application. Please forgive if my question is pedantic. I would like to get a series of satellite images all at the same scale centered around different points on ...
3
votes
0answers
58 views

Import Large Shapefile to Postgres

I'm trying to import a large dataset to Postgres, of about 600MB, that sits on a remote AWS server. But I get the following error Not enough memory to allocate requested memory (nRecords=26923892). ...
3
votes
0answers
29 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 ...
3
votes
0answers
25 views

Postgis - Construct linestring of length N

Give a table of linestrings (roads) ogc_fid, wkb_geometry And a road with ogc_fid = X In postgis how could I construct a linestring that is of length Y metres made up of roads starting from road ...
3
votes
0answers
30 views

How to get the geometries based on column values in postgis?

I have the following table in postgis I want to group the species along with geometries based on column values of 'val' i.e 11,11,11,11,11,11,11-corresponding species 6,6-corresponding ...
3
votes
0answers
42 views

Combine multiple adjoining parts of a single feature

In QGIS, one polygon feature resulted from merger of several adjacent polygons. This one new polygon feature has a single line through it that I would like to eliminate. When hovering over individual ...
3
votes
0answers
39 views

Resampling netcdf file

I have several years of precipitation data from CHIRPS that has a resolution of 0.05 degree. I'm currently working on a recharge script that has static data resolution of 0.01 degree. I'm trying to ...
3
votes
0answers
40 views

Transforming lat and long to Mercator x and y

I've been trying to plot a set of lat and long coordinates to a Mercator map using the following set of equations; x = long - long0 y = ln(tan(pi/4 + lat/2)) These equations are from a page on ...
3
votes
0answers
27 views

Calculating a specific distance from points along a network - GRASS

I'm currently using the v.net.iso function in GRASS (no access to network analyst in ArcMap). Does anybody know of a way to export the result to shapefile so that you have an individual line ...
3
votes
0answers
30 views

Is there a way to test HERE Maps offline?

I am developing web apps that implement HERE Maps. I would like to ask if there is a way to test it out offline (ie. in localhost or offline development machine)?
3
votes
0answers
26 views

ArcGIS Server Object Extensions: how do I deploy extra .dll's?

I am developing an ArcGIS Server Object Extensions in C# that makes calls into a C++ .dll. How do I add this .dll to deployment? By that I mean that I want it included in the .soe.
3
votes
0answers
28 views

Movement in cartodb

I have a DB with the history of the movement of a migrancy family. I would like to display these movement. How can i do? this is a good example my target
3
votes
0answers
42 views

Creating 30 areas with equal amount of road in an irregular polygon

The result should be something like this just more polygons. Does anyone know about a tool, which given a table, can create a number of polygons which will divide the tables object into, for ...
3
votes
0answers
17 views

ArcGIS webservice returning only one result when using FindAddressCandidates method

I am using ArcGIS webservice method FindAddressCandidates to fetch matching addresses to the provided input. But the result comes with only the top matching address. All other similar address are ...
3
votes
0answers
37 views

How to create a Polygon around a Linestring as a GeoFence in C# .NET

I'm looking for a .net library that will help to create a polygon that I can use as a Geo-fence around a route on a map. The following image demonstrates the result I'm after. Imagine that this ...
3
votes
0answers
38 views

Overlaying WMS in custom coordinate system with other layers in openlayers 3

I have a raster in a custom coordinate system (I added the coordinate system definition to the geoserver EPSG file so that I could choose it as the native projection. Now I would like to add it to a ...
3
votes
0answers
63 views

ModelBuilder inline variable does not change consecutively when iterating raster?

---SOLVED--- I am trying to create a model in ModelBuilder (ArcMap 10.2.2), where there is an iteration through rasters in a workspace, each raster is run through a formula in raster calculator and ...
3
votes
0answers
50 views

Can qgis_core work with external python distribution (such as Anaconda)

I've built a python application that has its own GUI. I am trying to use qgis.core/pyQgis as map display only. Specifically, i have anaconda 2.3 and its python distribution (2.7.11). After research on ...
3
votes
0answers
44 views

Wrong area using Albers Equal Area Projection in GRASS for Java, Indonesia

I am just getting to know GRASS 7.0 and I am struggling finding a good projection to work on a spatial analysis of Java, Indonesia. I am new to the forum, so if information's are missing for a better ...
3
votes
0answers
39 views

Positional accuracy assessment methods in qgis

I'm doing an quality assessment of openstreetmap's street data. As a comparism dataset I have to use an administrative dataset, which is highly accurate and comes in polygons. Here's a sneak peek: ...
3
votes
0answers
28 views

How to quickly get coverage of multiple services at once using pgrouting driving distance

I'm trying to get some useful information out of openstreetmap data to choose where to rent an apartment in my city. I used osm2pgrouting and osm2pgsql to get OSM data into my postgis database. So far ...
3
votes
0answers
23 views

Disk access characteristics of accessing vs building an image pyramid.

Hosting an extremely large (10-100x ram size) image pyramid via WMS has disk access characteristics closer to a random read, but generating the pyramid is a CPU bound sequential operation right?
3
votes
0answers
35 views

ArcGIS Manager fails login once, then succeeds

Often, when a user attempts to login to ArcGIS manager through online, although the username and password is correct, it will display, The username or password you entered is incorrect. however ...
3
votes
0answers
43 views

matplotlib show() suspends ArcGIS

I've written a python script to plot a cross-section from a DEM along a line. Everything works fine except when I Show the plot, ArcGIS hangs and I have to force it to close with Task Manager. I ...
3
votes
0answers
41 views

SQL SERVER 2012, Python subprocess, OGR

Need help with uploading shapefile with srid 102008 to SQL server 2012. I ran the ogr2ogr script in the ogr shell and it uploaded the shapefile within seconds but when I try using python subprocess to ...
3
votes
0answers
46 views

Can you add summary statistics to a legend in QGIS print composer?

I would like to be able to add summary statistics to a legend in print composer e.g. GB Agricultural Land Classification: - Grade 1 (Area: xx hectares, xx% of total) - Grade 2 (Area: xx hectares, xx% ...
3
votes
0answers
30 views

QGIS Georeferencer is stretching image

I'm trying to Georeference an image. I've followed the guide from QGIS, but for some reason, it's stretching, and offsetting the image from the points. For example, my input of the southwest corner ...
3
votes
0answers
38 views

Google Earth KML Autoload/Distribution

Situation: We have installed Google Earth on the whole computer network. We have one KML with all our projects. Need: Distribute the KML on all those Google Earth instances. Requirements: ...
3
votes
0answers
24 views

How to use pythons' GeoAlchemy2 to filter on dynamically generated Points?

I'm trying to do something like this SQL query in Geoalchemy2: SELECT district_polygons.district FROM markers, district_polygons WHERE ST_Contains(district_polygons.multi_poly, ...
3
votes
0answers
27 views

Mapnik: Parameterize queries for PostGIS datasource?

My datasource is PostGIS, but I need to build the query on the fly based on user-supplied filters. Obviously I don't want to create an SQLI vulnerability, so I'd like to parameterize my query, e.g., ...
3
votes
0answers
45 views

GDAL. Interpolation with breaks

I have a csv file dem.csv with data: LON, LAT, SO2(concentration) with NODATA=NAN. I need to interpolate my data from *.csv with breaks. I used gdal_grid with the command: gdal_grid -a ...

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