4
votes
0answers
50 views

Why won't my points (that I created by intersection) won't intersect with the geometry they've been created from?

I created a set of points by intersecting a linestring layer with the boundary of a multipolygon layer like this: CREATE TABLE freiraumkataster_grenze AS SELECT gid, ST_CollectionHomogenize(...
4
votes
0answers
35 views

Wrong coordinates after loading OSM to postgre

After loading OSM data for whole Europe to postgres (Osm2pgsql) I'm trying to add them to Geoserver, but the coordinates are totally wrong. The SRS is correct (4326), but the coordinate values are ...
4
votes
0answers
39 views

Stretch to MinMax results in blank render output in QGIS?

I am a new QGIS user, and I can't figure out if I encountered a bug. If I have a multi-layer image, and "Multiband color" -> "Stretch to MinMax" selected I get the following behaviour. QGIS takes a ...
4
votes
0answers
210 views

Display GeoJSON data on map using django-leaflet?

I want to display GeoJSON data on map in geodjango. When I use the below code only GeoJSON data like: { "type": "FeatureCollection", "features": [{ "type": "Feature", "properties"...
4
votes
0answers
58 views

Tolerance in PostGIS

I am working with spatial data in land management using Oracle. The daily task is to perform spatial analysis: defining the mutual disposition of land plots borders, territorial areas etc. The ...
4
votes
0answers
57 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: ...
4
votes
0answers
82 views

QGIS 2.10 Can't load georeference plugin?

Apparently my problem was already present in older versions of Qgis. I don't know how to fix it, knowing I have a Linux system (Fedora 23). Somethiing similar here : Where to download QGIS 2.10? So, ...
4
votes
0answers
71 views

Buffer neighbouring polygons without overlap using QGIS

Is it possible to create a buffer around neighbouring polygons, so that the new polygons do not overlap? Preferably in QGIS but any other tool will do. So instead of the first result I would like ...
4
votes
0answers
128 views

Counting number of plants in area using images from UAV?

How do I count the number of pineapple plants in a 1-hectare block? I have heard of these algorithms but I don't know how to do it. I'm still a newbie of QGIS, ArcGIS and ENVI. I have the NIR, RGB, ...
4
votes
0answers
72 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 ...
4
votes
0answers
47 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 ...
4
votes
0answers
54 views

Composite Bands (Data Management)

I am building a small multispectral camera based on the Raspberry Pi Compute Module and two Raspberry Pi cameras. One of the cameras has a NIR filter, the other is a normal RGB camera. When using the ...
4
votes
0answers
31 views

Center my contour values in QGIS

In QGIS have an issue with my contour value labels being pushed to the edge of my map, instead of lining up at the center where they seem to have more space. Does anyone know why this happens for some ...
4
votes
0answers
118 views

Create polygon from lines in PostGIS

I'm trying to divide a polygon in smaller polygons from a line, but I think I can't use the st_split function. What I need is to create small polygons inside a big one, using linestring grid. I've ...
4
votes
0answers
28 views

“Merging” 2 layers of LineString with splits at intersections

I would like to "merge" 2 networks of lines and these lines need to be split when they intersect. With pictures it should be clearer : What to do: if a black line intersects a red line, they ...
4
votes
0answers
92 views

Rule-based labeling and the Data defined placement options are not working together (QGIS 2.12, 2.14)

After setting "Rule-based labeling" to my layer (new feature since QGIS 2.12), my data defined labeling is not working any more (see labeling tools on the right side): Going back to "Show labels ...
4
votes
0answers
71 views

How to interpolate within defined boundaries of a deformed mesh using R?

My goal is to create an interpolation map of some output model results that are mapped on a deformed mesh (from a numerical simulation). The model results are in an x-y plane (representing coordinates)...
4
votes
0answers
68 views

Dynamically style geoserver layer with timestamp column --> age of entry

I have a a postgis table with point geometries and a timestamp column, which has the information when the point was created. This table is already loaded as a layer into geoserver. So now in ...
4
votes
0answers
249 views

“Error” on Advanced Digitizing Window in QGIS

I have the word "Error" that has appeared on my Advanced Digitizing Panel since upgrading to QGIS 2.12.0 Lyon. It doesn't appear to actually affect anything negatively... has anyone else seen this or ...
4
votes
0answers
74 views

SAGA Tool in QGIS Error: Load table: Proj.4-WKT Dictionary… failed

I have some problems with running SAGA tools in QGIS. I've downloaded and installed the software via the OSGeo4W Installer. It downloaded QGIS 2.12 and Saga 2.1.2. I wanted to use the Tool "Shapes To ...
4
votes
0answers
186 views

Twitter REST API missing geo-tagged tweets from Europe

I used twitter's REST API to get few thousands tweets from last two days. Everything went ok, but when I put tweets on the map, there is empty "box-like" area (no tweets for almost entire Europe - ...
4
votes
0answers
92 views

How to use GDAL Correlator?

I need to align several images using FOSS. There is Correlator tool in GDAL (source) that seems to be suitable for the job. But I was unable to find documentation for it or a tutorial. Can someone ...
4
votes
0answers
42 views

What's the binary format of ENVI (Classic) ROIs?

I'm a (lonely) 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 ...
4
votes
0answers
156 views

Open ArcMap in Maximized State in C#?

I am running windows 7 enterprise with ArcMap 10.2 l have an application that processes data, when the data is finished processing I have a button that will show the results in a datagrid. From this ...
4
votes
0answers
162 views

Creating materialized view from ArcSDE layer

In the past I've used materialized views in Oracle to replicate non-spatial data from one database to another. I'd like to do the same thing with an ArcSDE feature class, but I'm wondering how that ...
4
votes
0answers
217 views

How can I properly rename a table in a SpatiaLite DB?

Spatial layers (tables) in SpatiaLite include various supporting objects and metadata, including triggers, indices, and entries in (at minimum) the geometry_columns table. I'm looking for (preferably) ...
4
votes
0answers
84 views

Speed optimization of shadow computation with grass gis r.sun

I am trying to optimize the speed of r.sun to compute shadowed area on a DTM at 1m resolution. My current area is 3.39 km² but my final area will be 450 km². The r.sun wiki say that pre-computing ...
4
votes
0answers
249 views

How to remove nodata values from XYZ output with GDAL?

I have a buffered line route that is overlayed on a DEM: I've clipped the DEM to the buffered line, and exported it as an ADF ESRI grid file. I then used gdal_translate to convert it from the Arc/...
4
votes
0answers
241 views

QGIS 2.10.1 & SQL Server 2014

I'm struggling to load spatial data into QGIS from SQL Server 2014. I have a table with 4 geography columns (3 are polygon layers, one is a point layer). The table has a primary key column that is a ...
4
votes
0answers
130 views

From Landsat spectral radiance (W/m2*sr*µm) to Global horizontal irradiance (W/m2) for mere mortals

We are working in a solar energy project to locate potential sites for solar panel farms. We are using the Landsat 7 panchromatic band to derive radiance with GRASS using i.landsat.toar (W/m2*sr*µm ...
4
votes
0answers
88 views

Why does @data@values slot for RasterLayer only contain logical(0) and not the actual values?

Trying to get to the bottom of why, when I read in a raster of NDVI, the @data@values slot does not contain the actual values until I set them manually. For example: NDVI <- raster("./filename....
4
votes
0answers
158 views

Segmentation fault in SAGA GIS

When I try to launch SAGA GIS I get this error: "segmentation fault (core dumped)" How can I solve this problem? I am using Lubuntu 14.04 64-bit.
4
votes
0answers
37 views

Cropping EUDEM with GDAL creates zig-zag terrain

I have downloaded EUDEM (20 Gb) from http://www.eea.europa.eu/data-and-maps/data/eu-dem#tab-original-data When I try to crop it by GDAL using: gdalwarp -dstalpha -of EHdr -crop_to_cutline -cutline ...
4
votes
0answers
70 views

Save edits before disconnecting users from enterprise geodatabase?

Is there any method that enables the Administrator to save the users edits before disconnecting them for an enterprise geodatabase. Because I am disconnecting users as shown in the screenshot, but ...
4
votes
0answers
73 views

Why different transformation behaviour ArcGIS Pro 2D/3D layers?

I am working with ArcGIS Pro and have noticed a strange difference between the co-ordinate transformation of 2D and 3D layers. Here are my transformation settings: I have the same layer ...
4
votes
0answers
111 views

Integrating numeric scales into a text or HTML box in QGIS print composer.

I am trying to embed the scale of a map in the print composer expression builder or HTML frame. Effectively the value of the scale in the map item properties would come through into the text and be ...
4
votes
0answers
510 views

QGIS on UHD screen

I've got a new laptop that came with a 4k UHD screen. The GUI on QGIS doesn't scale well making most of the menu elements too small to easily see. Is there a way to change the scale of the gui?
4
votes
0answers
232 views

QGIS procedure for Multidirectional, oblique-weighted, shaded-relief?

Is QGIS capable of the multidirectional, oblique-weighted,shaded-relief method described at http://pubs.usgs.gov/of/1992/of92-422/of92-422.pdf ? If so, what are the steps necessary in QGIS to ...
4
votes
0answers
335 views

Error when using r.watershed in QGIS 2.10.1 with Grass

I am running r.watershed within QGIS processing the I get the error below. I draw your attention to: GRASS_INFO_WARNING(2205,1): Subprocess failed with exit code 256 GRASS_INFO_END(2205,1) ...
4
votes
0answers
701 views

Connect to QGIS 2.6 Python Plugin function via button on custom feature form

I am trying to connect to a QGIS 2.6 Python plugin function via a custom feature form button. On my feature form, I'm attempting to do a few things : enable the updateButton only if the ...
4
votes
0answers
266 views

How to digitize in stream mode in QGIS, using a tablet?

How to digitize in stream mode in Qgis, using a wacom cintiq tablet? freehand it's no use. i need something like MNDR stream digitizing extension for arcview 3.x, which allows continuous tracing, ...
4
votes
0answers
127 views

Merge Raster Layer Specific Order in Graphic Modeler

I'm using the Graphic Modeler/Processing Modeler to automate a process. The last step in this process is Merging three different Raster Layers. I'm using the "Merge Raster Layers" from Saga 2.0.8. Is ...
4
votes
0answers
382 views

How to set up graduated colors for a layer using ArcObjects?

I have to render a feature layer with a graduated colors renderer, using the ArcGIS API for Java (or VB, .NET). As the feature layer data is created dynamically using webservices, I don't in advance ...
4
votes
0answers
241 views

Is there a way to expose Spherical Mercator Lat Lon in Google Map API?

The map tiles in the Google Maps are in Spherical Mercator projection (srid 900913), but in the API the methods report coordinates in Lat/Lon WGS84, e.g. map.getCenter(). Is there a way to return the ...
4
votes
0answers
176 views

QGIS - assign different colors for SVG markers also in categorial / graduated symbols?

I understand it is possible to customize the color of an SVG marker via param(fill) However, I have to set the color manually, and cannot automatically assign it through categorical or graduated ...
4
votes
0answers
516 views

Inserting coordinates from Google Maps into a Database

My question is pretty basic. I am using Android Google Maps to take the coordinates off a location on the map and I want to insert it into a PostgreSQL database. I know I have to use PostGIS but how ...
4
votes
0answers
281 views

How to set Vertical Coordinate system when creating a 3D shapefile?

I'm working with GDAL v1.11 and am seeing the vertical CS stripped when exporting a 3D shapefile (from oracle spatial). This is the command I'm running: ogr2ogr -f "ESRI Shapefile" B_POINT.shp (...
4
votes
0answers
105 views

Adding data from PostgreSQL to Query Layer of ArcGIS for Desktop warns that given coordinate references are incompatible?

When adding data from PostgreSQL in a Query Layer I get the warning: The given coordinate references are incompatible I have added many other layers with the same properties no problems, but I ...
4
votes
0answers
273 views

Problem with ImageMosaic plugin of Geoserver - invalid shapefile/tif missing in GetCapabilities

I'm trying to use the ImageMosaic plugin of Geoserver for raster time-series data (I followed this tutorial: http://docs.geoserver.org/latest/en/user/tutorials/imagemosaic_timeseries/...
4
votes
0answers
102 views

Is it possible in QGIS print composer to include a numeric scale in an html box?

For work I always have to create a table with my name, project name, date etc. into my map layouts. I also need to include the scale like "1:150000" in that table. So far I am solving that by ...

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