0
votes
0answers
6 views

QGIS 2.14.4 How to get the legend of a Vector heatmap layer?

I'm new on QGIS and PyQGIS. I'm trying to create a plugin which aims to apply a style on a vector layer (generated from a csv file) and then save the map as a png file. The style I apply on the ...
0
votes
1answer
21 views

Arcmap: Calculate area of polygon within Buffers

I've created 2km buffers around 108 points and clipped habitat maps to these buffers, as per instructions given. I now need to calculate the area of each polygon of each habitat type within each ...
0
votes
0answers
14 views

Trouble Merging two Shapefile Layers in ArcGIS Desktop

I am having trouble merging two shapefile layers from ArcGIS 10.4 Online in ArcGIS 10.4 Desktop. Every time I attempt to execute the Merge an error message related to the content of one of my fields ...
0
votes
0answers
4 views

Web service to get near by road on giving Latitude Longitude

Is there a web service available which on providing a Latitude and Longitude can give the nearest road with its type i.e. whether the road is a highway or district road? Google reverse geo-coding ...
0
votes
0answers
2 views

Selecting by character strings from field using ArcGIS / R bridge

I am attempting to use the ArcGIS / R bridge R package "arcgisbinding" in order to do the following: I am trying to select features in a map layer based on textual matches, and I thought that I might ...
0
votes
1answer
4 views

replacing shapefile data source in subdirectories with feature class

I have lots of mxds in subdirectories of this folder. I would like to walk through them and replace a shapefile with a feature class from a geodatabase with something like this. This code here is not ...
0
votes
0answers
13 views

Unable to find tools in ArcMap 10.3.1

We just upgraded to 10.3.1 and I'm having trouble finding some of the tools. I have searched and searched to no avail. Here is what I'm looking for: Find dangles, find overlaps, transfer point to ...
4
votes
2answers
29 views

How to edit an existing layer using leaflet?

I am used to working with OL3 and I wanted to try using leaflet and see if it is as powerful as OL. I loaded a map with some data from a GeoServer WFS layer using this tutorial from Georepublic. var ...
0
votes
0answers
10 views

Focal Statistics produces corrupted/ partial Output ArcMap 10.4.1

I recently encountered an issue with ArcMap that I am not able to solve by a workaround: I have a grid file covering the EU plus a couple of other countries inside a *.gdp (cell size 1000 x 1000 m). ...
1
vote
2answers
96 views

Applying OSM z-order after osm2pgsql with qgis

I've trying to find a solution to applying the OpenStreetMap z-order in QGIS after using osm2pgsql. Everything is working perfectly, until I add the each layer to the canvas, where the z-order is not ...
2
votes
1answer
44 views
+100

Qgis globe plugin (2.16) missing on Ubuntu 14.04

I just upgraded from Qgis 2.14 to 2.16 and I can't get the Globe plugin to work. Apparently, under Ubuntu it is necessary to install it separately. But in the Ubuntugis repository, only version 2.14 ...
0
votes
0answers
15 views

2D raster to 3D raster conversion problem “r.to.rast3” at GRASS GIS

Although I give the r.to.rast3 command and the program gives a success report, the output 3D raster is not seen at the map display window when I select 3D view. Why does it happen?
3
votes
1answer
352 views

Import error when utilizing QGIS's Python Init function

Based on the answer to Referencing Qt UIs external to plugin with python. I'm trying to utilize the "Layer Properties / Fields / Python Init function" to execute a file (test_file.py) that is located ...
1
vote
1answer
216 views

Allowing user to import any file in OpenLayers 3 map control?

I have started exploring the OpenLayers 3 library. I have seen the examples but i am not able to find the way for import shapefile and load it on OpenLayers's map control. I want give option for ...
1
vote
1answer
13 views

Generate a map image file from tiles and features

I am looking for a way to generate images (e.g. png) from a tile source with features added on top of the map, without user interaction or requiring a browser. Currently, I am able to create a ...
1
vote
3answers
65 views

Why is the Globe plugin missing in QGIS 2.17.0 master?

It seems that the 'Globe' plugin is missing in QGIS 2.17.0 master. Is this a bug or is there something I'm doing wrong:
1
vote
2answers
19 views

Updating linestring geometry by replacing its points

I have a linestring on my postgis. and I want to update a point in this linestring. I mean I want to update the geometry of the point in the line string by an other points
0
votes
1answer
7 views

Leaflet plugins - how to use two plugins together

I want to use two leaflet plugins: ExtraMarkers and IconLabel. How to combine them together? The result should be ExtraMarker with label. When I create ExtraMarkers: var icon = L....
0
votes
1answer
9 views

Adding nodes to sddraft using minidom

I want to add this extension to an sddraft using minidom and can't figure out how to do it. Some help would be great. To start with I'd like to find out how to add the first node SVCExtension xsi:...
1
vote
0answers
9 views

Calculate centre point of SpatialGrid object

I am using R and have a SpatialGrid object similar to the example from this question: Overlay a spatial polygon with a grid and check in which grid element specific coordinates are located ## read ...
0
votes
1answer
6 views

Change geomarker in symbol

How is't possible to change the geomarker in another symbol? For examle 'a bike' http://openlayers.org/en/latest/examples/feature-move-animation.html
0
votes
0answers
3 views

Clear Cartodb.js layer of a Leaflet map

I'm getting problems to clear a Carto Layer. The aim of the function is to locate some closest points and repeat the operation removing the previous query. The query and the data receiving are working ...
1
vote
3answers
77 views

Changing height/interpolation/shape of raster layer

I am kind of a beignner in ArcGIS and thought about and googled this problem for two days now. I am working in ArcScene making a 3D visualization of a bedrock surface of a town. I have a polygon ...
0
votes
0answers
5 views

Combine cluster and categorical mapping on Cartodb

I came across this map that shows clusters but when you zoom in, the they split into points reflecting categorical data. How do I replicate this on cartodb?
0
votes
2answers
11 views

Calculate Surface area of polygon, within the lines of another polygon

I have to shapefiles, both polygons. 1) The first file represents the administrative boundaries of provinces. This file contains a lot of fields. [social, geographic, natural, morphological etc] 2) ...
1
vote
1answer
7 views

Get features of external geojson file

I'm loading an external geojson file with the next code: var sourceTour2016 = new ol.source.Vector({ url: 'tourdefrance_2016.geojson', format: new ol.format.GeoJSON() }); var ...
0
votes
0answers
5 views

QGIS 2.14 hangs at “Starting up the GUI” and fetching plugin repositories

All of a sudden, QGIS 2.14.4 hangs on startup on Win7 for at least 2 min. Eventually it starts without error. Hardware is not the issue (Core i7, 8GB ram, etc.). I tried reinstalling with OS4Geo ...
1
vote
1answer
265 views

How to apply new WFS-Filter features like intersect

I was pleasantly surprised to find very much enlarged filter support in QGIS-Dev (1.9.0_Master). One application would be a WFS-Filter which combines $geometry and Intersect in order to load only the ...
1
vote
1answer
10 views

How to edit a WFS layer with leaflet draw

I have spend more than 4 hours trying to figure out how I can do this. I use Leaflet and Leaflet Draw in order to draw news features on my map. Now I want to be able to edit features of an existing ...
2
votes
1answer
868 views

R : How to build heatmap with the leaflet package

I read a post about interactive maps with R using the leaflet package. Very interesting by the way. In this article, the author create a heatmap like this: X=cbind(lng,lat) kde2d <- bkde2D(X, ...
0
votes
0answers
5 views

How can I alter the feature_text_html.xsl in ArcGIS Server 10.3.1 to display images?

In my WMS layer I have a URL pointing to an image. Does anyone have an example of how to manipulate the HTML template to display the image?
11
votes
4answers
2k views

How to update file locations in QGIS projects?

I have about 30 different QGIS Project files for 30 different clients. Each is saved onto my computer and all their relevant vector and raster files are all saved locally. We are now in the process ...
2
votes
0answers
17 views

Dissolve and join features based on an attribute range

Note: I have edited the post to suggest a possible solution. I have a CSV file of Postal Codes containing average energy usage information. Furthermore, I have Feature Classes (both points and ...
1
vote
0answers
26 views

Resolving geometry errors in QGIS

I have a shapefile where the geometry is a mess, lots of gaps, slivers, and holes. I need to correct these geometry errors, but I am having trouble with the process. I have read the pages here, here ...
1
vote
2answers
301 views

OpenLayers: Point icons disappearing

I have a very simple setup where I have a feature vector layer on top of an OSM layer in OpenLayers 2.13.1. However, I notice that the icons of my points in the vector layer begin to 'become invisible'...
0
votes
0answers
4 views

calculate watershed area for many points

Is there an efficient way to calculate the watershed area for many points using GRASS without looping through all points? My points lie anywhere on the stream segments not just at the junctions. This ...
2
votes
1answer
41 views

Why is QGIS project in recent projects greyed out?

When I open QGIS, there are projects which cannot be chosen. They work when I start browser of files and click in directory where the projects are. Are there options to change it?
2
votes
0answers
20 views

postgis query performance

The db structure is more or less like this and can't be modified. I can only add some indexes but can't set for example foreign keys: CREATE TABLE adresspoint ( id character varying(3999) NOT ...
0
votes
0answers
4 views

change layerb color in openlayers [duplicate]

i'm using Geo Server. i made a html code that shows a base map and my layers(point, polygon& line)& some other capabilities like hiding the layers and query. i want to make a tool that users ...
1
vote
1answer
95 views

US boundaries from 1780 map

Where can I find a shapefile of the US boundaries from the 1780s, including the original thirteen state boundaries?
0
votes
0answers
4 views

Execution of a QueryTask for ArcGISDynamicMapService

Hi GIS Stackexchange users, I am going to display the query results on infotemplate. I have written the code which i have mentioned below. After execution of this code jus getting a point on map but ...
1
vote
2answers
46 views

Can't normalize LiDAR point cloud with lasheight and -replace z (LAStools)

When I try to use lasheight with -replace z to normalize the point cloud, the height of points are changed (destroyed heights; see pictures below). Without using -replace z everything is ok, but the ...
12
votes
2answers
3k views

What is the difference between != NULL and IS NOT NULL?

I have a shape layer with an attribute containing NULL values to which I would like to apply a filter for values different from NULL. Using the available gui for such query construction, one would ...
0
votes
1answer
9 views

Updating attribute field with random string value

I have a shape layer in qgis with blank attribute table. I want to fill attribute table with false data randomly. I successfully update the field with integer values using 'rand' expression. I am ...
3
votes
0answers
16 views

Restricting edits for specific fields in a feature class for particular users

How to restrict edits for specific fields in a feature class for particular users in ArcSDE. For example, there is a feature class called “Tower”. It has 20 Fields. Out of 20 fields, 10 are updated ...
-1
votes
0answers
10 views

Working on query builder in QGIS?

I installed QGIS 2.16.1 and i want to work with the data using query builder. It was active and when i click it nothing pops us and now it is just deactivate. Is it related to plugin or what ?
0
votes
0answers
8 views

Syncing modifications between two vector datasources [on hold]

I work for a small business that offers field biology/ecology services. We want to modernize the way we collect data on the field. I discovered apps like MapIt and Roam. I installed MapIt on my ...
0
votes
0answers
8 views

PyQGIS QgsVectorLayer.uniqueValues() override active object filtering

This code snippet gives me the unique values for a vector layers attribute called myfieldname l = iface.activeLayer() attrIndex = l.fieldNameIndex('myfieldname') uniValues = l.uniqueValues(attrIndex) ...
0
votes
0answers
14 views

What are the significant differences between SpatiaLite and Geopackage? [on hold]

SpatiaLite and GeoPackage are both based on SQLite. Both are supported by ArcGIS and GDAL (and therefore all projects that rely on GDAL, such as QGIS and R). I would like to adopt one as the default ...
0
votes
0answers
11 views

Least Cost Path for connecting start- and end-points of guard rails ArcGIS 10.2

EDIT: The picture above shows a sample of the data I'm working with. I want to connect each green point (start point of the guard rail) with its corresponding red point (end point of the guard ...

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