0
votes
0answers
9 views

How to calculate the area of polygon features within another polygon feature layer

As shown below, I would like to calculate the percentage of each red feature (landscape zones) taken up by a green feature (forest zone). So I need the summed percentage of forest zone for each ...
0
votes
0answers
3 views

CartoDB Torque Cat

I've uploaded a dataset that includes a time column. In the wizard I can select and configure a Torque map and it works as expected. When I switch to a Torque Cat map the markers disappear. The legend ...
0
votes
3answers
16 views

Volume using VB Script of the field calculator

I am trying to compute the volume of the area given certain condition. i wrote the following VB code however, i am getting error that it has failed to do so. Can anyone look into it and suggest a way ...
0
votes
0answers
8 views

MMGIS not able to connect to maps.googleapis.com

I've been trying to geocode a few addresses from a .csv file to a shapefile. Been using MMQGIS on Qgis, but, even though I seem to have everything set up properly, I continually get the error message ...
0
votes
1answer
8 views

Parsing error with field calculator

I am trying to do a simple calculation that populates a field based on a set of acreage figures. I am using if/else if statements with acreage ranges. Here is the python script I came up with. def ...
0
votes
0answers
10 views

How to define border colour for rule-based style using PyQGIS?

I use the following to create a Rule-based style for a given layer which includes defining a label, expression and colour fill: from PyQt4.QtGui import QColor layer = qgis.utils.iface.activeLayer() ...
1
vote
0answers
3 views

Geonetwork 2.10: creating metadata for documents (reports, etc.)

I am using geonetwork 2.10, and I would need to create meta data for documents such as reports. Which template am I supposed to use? The only template I found which looks close enough to me is "...
1
vote
0answers
9 views

Georeferencing postcodes into bubble map with Cartodb

I have recently discovered Cartodb and I am trying to create a bubble/thematic map of postcodes. I have a csv document with one column of postcodes from around the UK. I have uploaded the dataset and ...
1
vote
0answers
10 views

DST with GIS modeling

I work to apply the dempster shafer theory (DST) on the Groundwater vulnerability. Goal : integration diffrents method like FR, AHP ... with DST. If some one can help me to calculate the uncertainty ...
3
votes
0answers
22 views

Download OSM data with QuickOSM and QGIS Modeler

I've been using QuickOSM plugin for some time and I would like to create some model that allows me to automate OSM data dowload in order to make sure that I am always working with the most updated ...
1
vote
0answers
6 views

QGIS 2.14.2 Rotating map quick map service

I am currently using an Esri basemap. Standard built in functionality of QGIS 2.14.2 allows for the rotation of vectors, rasters etc. When I use rotate, all the vectors I added personally rotate just ...
1
vote
0answers
6 views

Adding text to ArcGIS Javascript layer

I am using the ArcGIS Javascript API (v3.15) for a basic use case of placing some markers with text on a map. I am able to add the marker, but I am running into issues inserting text on that marker. ...
0
votes
0answers
12 views

postgis iterate over rows (cursors)

I need to repeat the same set of operations for each road polygon by using an id (road_id): I have tested my code only on one polygon of geometry using a series of functions inside a WITH query: ...
1
vote
0answers
6 views

How to customize DB Manager default parameters

I'm using QGIS 2.10 and DB Manager plugin. I regularly use this plugin to display tables from a PostgreSQL - PostGIS database. I particularly use the integrated SQL Window to filter a table's content ...
4
votes
2answers
81 views

Distance between centroid and farthest point of polygon

I have a village polygon layer which has more than 6,00,000 records. I have calculated centroid of each village. I want to find the distance between centroid and the farthest node of each polygon. ...
1
vote
0answers
9 views

multiple median or mean points

I am using ArcMap 10.3. In my map there are resources, and I want to find the location which minimize the distance between them. If I use the Mean or Median Center weighted on the resource I find just ...
0
votes
0answers
8 views

Georeferenced images gives wrong scale

When I georeference satellite images with a CRS for my region (Hartebeeshoek94), I get a scale of 1:10 and larger. But when I use WGS84 the scale appears correct, e.g. 1:50 000. I am using QGIS v2.13....
0
votes
0answers
5 views

proj4 fails to create projection with “+units=degrees”

basically my problem is that pj_init_plus works fine with +proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs but fails with +proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs +units=degrees I ...
0
votes
0answers
2 views

Error found while retrieving conflicts ArcMap 10.3

I have a problem when trying to review Conflicts in ArcMap 10.3 I have found a similar question ,and in the solution there was a link to download ArcSDE service pack , but the link was invalid . ...
2
votes
1answer
13 views

SAGA Raster Calculator in QGIS Graphical Modeller not subtracting

I am using QGIS 2.8.1 to build a model. All is working fine until the raster calculator input. I understand that the raster calculator in QGIS Modeller is a SAGA tool. With this, I have tried both the ...
0
votes
0answers
6 views

why when i use from mosaic to new raster the created raster has some pixels with 0 value

**why when i use from mosaic to new raster the created raster has some pixels with 0 value?*
0
votes
0answers
17 views

Selecting only time in datetime field

I have a 'date' field (is a date field) in ArcGIS that contains both date and time: 'mm/dd/yyyy HH:mm:ss' and need to query only the time portion regardless of the date. I need times between >= 09:00:...
0
votes
1answer
15 views

Using the OS Open Background basemap with ArcGIS JS API 4

I'm relatively new to the ArcGIS JS API, but I'm looking to use the OS Open Background as the basemap. I'm using the latest (4.0) API and I can't find a working example or decent documentation that ...
0
votes
2answers
24 views

ArcGis - simple ifelse syntax question in the field editor (python)

I want to calculate a field in the filed editor depending on the values in 4 other columns. My columns are "A", "B", "C" and "D" Now I want to fill the column "X" with: if "A" and "B" are equal "0" ...
0
votes
0answers
6 views

How to append all open layers into one in argmap?

I have used python script to open all layer in arcmap. Now how do I append all feature into new shapefile? I tried append toolbox but as the number of layer is 100 it's not practical.
0
votes
0answers
13 views

incrémental (dynamic) Delaunay triangulation [on hold]

i ask if there is any incrémental (dynamic) Delaunay triangulation in qgis core OR plugin ??
0
votes
0answers
16 views

Truncate and Load/append/copy data from Feature Dataset to Feature Dataset

I have a SDE featuredataset which contain 20 layers updated every month and historic featuredataset which have the layers from the last month. it is not a big volumen of data, something like 10000 row ...
1
vote
0answers
21 views

batch convert geojson to shapefile [duplicate]

I have a directory full of geojson files that I need to convert to shapefiles for editing in QGIS. As far as I have searched, there are no resources in GIS StackExchange that explain how to do this ...
0
votes
0answers
5 views

Areal Clustering with Differentially Sized Areas

I'm currently learning a little about spatial auto-correlation. I'm quite interested in seeing if areas with higher/lower residuals from a linear regression model tend to be closer to one another (...
2
votes
0answers
10 views

Create time series graph with multiple rasters

I need to create a time series graph for a few random cells with known underlying attribute such as "forest" or "agriculture" based on the VCI (Vegetation Condition Index). I have been reading and ...
1
vote
0answers
15 views

Finding average number of locations in each neighboring census tracts within a given distance

I have used the buffer and intersect tools to identify point locations within a certain distance of a census tract's boundaries. I now want to calculate the average number of point locations in each ...
1
vote
1answer
44 views

How to convert latlong into Postgis geometry?

I have this excel spreadshit with latlong coordinates in it and imported it into Postgis Problem is that I can't represent it on Geoserver because there is no typical Postgis geometry column How to ...
0
votes
0answers
11 views

Google Earth Engine and Sentinel-2

First at all, I'm new at Google Earth Engine and Javascript. I'm trying to use Sentinel-2 data in the API following this tutorial of Landsat data (https://developers.google.com/earth-engine/...
1
vote
0answers
16 views

Segmentation fault in readasarray

I am running the following code and get: Segmentation fault (core dumped) I have no clue why, I have been using the functions many times before and now suddenly this happens. Sometimes it happens at ...
1
vote
1answer
12 views

Can i take the wms url from the user interface

If user wants to overlay his own wms layer overlay on the basemap of our portal, then how can user pass that url to openlayers method like below code enter code here overlayGroup.getLayers()....
-5
votes
0answers
16 views

Number of bands hyperspectral sensor has? [on hold]

How many bands does hyperspectral sensor have in visible and near infrared spectrum with spectral resolution of 0,03 µm, with some explanation?
5
votes
1answer
109 views

How to close/remove QGIS welcome page (recent projects) with Python?

Is it possible to close the QGIS welcome page with Python? I have a permanently docked Python plugin, that uses showRubberBand to directly write into map canvas. Therefor I have to close/remove the ...
0
votes
0answers
11 views

Is Output Cell Size Environment the same as Resample tool?

I have a raster catalog that contains hundreds of rasters (10 x 10). I need to perform Cell Statistics SUM on all the raster. End user able to specify under what cell size the want to perform the ...
1
vote
1answer
11 views

Proj4js - no transformation for epsg2056

I have a script which converts local coordinates to WGS84. The script works fine if source data and source CS is epsg:21781. The CS for the data has changed now to epsg:2056. When I use epsg:2056 as ...
2
votes
2answers
79 views

Opening ECW files in QGIS?

QGIS 2.14.1 opened .ECW files simply via the open raster menu, without any problems. In 2.14.3, the entire ERDAS Compressed Wavelets option has disappeared from the file type drop down, and QGIS ...
0
votes
1answer
14 views

Creating 700 m x 700m grid in ArcGIS for Desktop? [duplicate]

I'd like to know how to create 700m x 700m grid array in ArcGIS. I am a beginner at GIS. I'd like to develop the insect distribution map.
2
votes
1answer
37 views

QGIS Filter layer by expression [on hold]

Can I make the filter by the value that is obtained by the function? for feature in iter: name_dot = feature['name'] print name_dot expr = QgsExpression("\"name\"=name_dot") selection= layer....
0
votes
0answers
4 views

OSGeolive 9.0: upgrading geoserver

I am using OSGeolive 9.0 (which I installed on my hard drive), because I need to have geonetwork 2.10. However, I would like to upgrade geoserver: - how can I upgrade it; - and how can I configure it ...
0
votes
1answer
18 views

Removing pixels in raster map using ArcGIS for Desktop?

I made a raster. I wonder how can I remove pixels with values lesser than an specific value? for example How is possible to set the value of classes from 0.92? i have searched it and i found this ...
-1
votes
0answers
9 views

Code in jscript for application to show drop down list; values of list to be get by the dynamic layer service?…zoom to the selected value [on hold]

I am developing application in jscript. i want that from a dynamic layer the value of different zone it will collect and show in dropdown list and will click on the value(any) it zoom to that zone
1
vote
1answer
96 views

Performing simple line-of-sight analysis in QGIS?

I've just installed QGIS on macOS in an effort to determine if two points in my neighborhood have line-of-site. I've got a 7.5 arcsecond DEM loaded, and a point layer with my two points (no elevation ...
1
vote
0answers
14 views

QGIS Offline Editing Tool

I tried to test the QGIS Offline Editing Plugin but it appears not to work at all. I'm using qgis 2.14.3 running on a Lenovo Yoga 900 and Windows 10 on the client side. For the server I'm running ...
0
votes
0answers
8 views

How to integrate multiple tile outputs generated from gdal2tiles into a single google map

Todo Generated tiles from image1.tif - done Generated tiles from image2.tif - done Need to overlay these 2 sets of tiles on top of google maps - this is the problem gdal2tiles generated ready-made ...
1
vote
1answer
28 views

Array written by GDAL with Python script has numbers read as “nan” by QGIS?

I would like to write an array to a geotiff with Python script using the GDAL module. When I try to do something simple like copying an existing GeoTiff via reading it to an array, then, writing to a ...

15 30 50 per page