0
votes
0answers
2 views

How can I check in QGIS python if an atrribute is included in my layer?

I use the following code: for field in self.layer.pendingFields(): if field.name()=='elevation': do this else: do that Although ...
0
votes
0answers
4 views

Mapping Ecclesiastical Parish Data

I am looking for a way to plot data relating to the number of people in a given location - the location being an ecclesiastical parish. So I need software that will allow me to import a map of ...
2
votes
1answer
315 views

Geoserver WFS-T insert no response. bug?

I use Geoserver + Openlayers and want to add and save some new Points via WFS-T. I created insert transaction (correct) and sent it, but no response (include errors) was returned. In console was only: ...
0
votes
2answers
28 views

How to create a store map using LeafLet

Im looking to create a map that can be interactive. The best option that I found is leaflet, the thing is I don't find any resource explaining how to create my own map. Im looking to create a mall ...
3
votes
2answers
126 views

Boundary from Points

I have a point cloud and need to process a very detailed boundary around the outer points. Is there a tool in QGIS? Convex hull is not detailed enough. Thank you!
0
votes
0answers
47 views

How do I design a database for storing GPX tracks and supporting spatial queries?

I have a series of GPX files that contain 1...n tracks. Each track contains roughly 5k - 10k points. The GPX files do not contain waypoints or routes. I want to design a database with the following ...
0
votes
0answers
15 views

Drawing Lines Between Postal Codes in Fusion Tables

I'm using Google Fusion Tables and have two columns of corresponding postal codes. Fusion Tables automatically converts postal codes to coordinates (the centroids of each postal code) upon import. ...
0
votes
0answers
5 views

PgRouting: Target vertex error

I'm trying to make a matrix that shows the cost from a node to the rest of the nodes in a network. The final result I'm looking for is not the cost, but only know if a car can or can not reach each ...
3
votes
2answers
2k views

How to convert 6 & 7 digit coordinates to degrees latitude & longitude

I'm a bit new to the whole GIS world, and though I am making great headway drawing polygons and such in Bing Maps, I am currently stuck. In our SQL spatial data, I came across MULTIPOLYGON data, where ...
0
votes
2answers
18 views

Defining custom basemap toggle in ArcGIS API for JavaScript?

I'm using arcgis js spi for 3.13 edition, when I using basemaptoggle widget from https://developers.arcgis.com/javascript/jssamples/widget_basemap.html is ok, but when defining my own basemap is ...
0
votes
0answers
5 views

what is the “clip” feature for color ramps?

In the singleband pseudocolor band rendering, there is a boolean checkbox "clip". What does this do? I don't notice a difference in my maps and haven't found documentation for it. Thanks
4
votes
4answers
138 views

Is there a quick way to clear all the data from a layer but leave the polygons in place?

I have a layer with several polygons, each of which has data in over 100 fields. I need to create a new layer with all the same polygons, but with all their data fields blank (set to 0, Null or empty ...
0
votes
1answer
10 views

Dynamic Layer Name - Leaflet Layer Control

I would like to have the name of a layer used by Leaflets layer control feature come from a variable instead of a string and based on data from the layer. The example shown below uses the variable ...
2
votes
2answers
463 views

Authentication in Geoserver 2.4.x from a web application

I am trying to build a web application using html and javascript from which I want to login to geoserver hosted at: https://weaveprod.ucdp.utah.edu/geoserver/web/ I have written the following code for ...
0
votes
0answers
20 views

Database connection fails when using db authentication, succeeds using OS

When i attempt to make a connection to a database on my SQL Server 2014 sever via Database connections in ArcCatalog using with db authentication i get the lovely "Connection was attempted with an ...
0
votes
1answer
27 views

Leaflet map.locate, very long response time

I'm using leafletknn to search the nearest geojson element from the user location. I add a map.locate method that zoom to the user location. The response time is longer than when I directly use it... ...
0
votes
0answers
5 views

QGIS 2.10.1: Unable to stylize as pseudocolor render type

In a raster layer's Style Properties, I can choose pseudocolor render type, and choose a color ramp and classify the raster. However, when I click the 'Apply' button, or click 'OK', the ...
1
vote
1answer
31 views

How can I rename all feature classes in a file geodatabase?

I have 8 separate geodatabases in which are contained tiled feature classes all of the same name e.g. TopographicArea. So that each of my File Geodatabases contain a feature class called ...
0
votes
2answers
228 views

Adding Drawn Feature to existing Layer

-A layer that contains multiple features - I want to draw new features with new OpenLayers.Control.DrawFeature and to add them to my layer. var control = new ...
0
votes
1answer
22 views

Isolate points with same parcel but different x and y coordinates

I have a large list of 100000 points in shapefile format. These points have address, parcel number and x and y coordinates as attributes. I would like to know which and how many points have the same ...
1
vote
0answers
33 views

Is this algorithm Possible?

I have some basic notions of python. I would like to know if this algorithm is feasible in ArcMap: -loop through all entries in a dBase table -for each entry, open the related table (Shapefile ...
1
vote
0answers
6 views

How to combine 3 rasters: 1 without Geoinformation, 1 with Lat-coord-values and 1 with Long-coord-values

I have multiple raster images without geoinformation. The geoinformation is stored seperately in two other rasters: one contains the Lat-coordinate of every pixel, the another the Long-coordinates. So ...
0
votes
0answers
8 views

Updating a column in MapInfo based on Symbology or colour

I am transferring a large dataset from MapInfo (V 12.0.2) to QGIS (V2.8.1) and I want to be able to create a column in the MapInfo attribute table that differentiates features with different ...
1
vote
1answer
16 views

QGIS: Finding electric network loops

With QGIS, how can we analyse an electrical network to find loops? Using Python is not a problem, however there is not a solution in the QGIS Python API. The QgsGraphAnalyzer has dijkstra and ...
-2
votes
0answers
40 views

Why would this script only load 14 out of ~13,000 feature classes to the topology?

The following script adds ~13,000 feature classes in a gdb into an existing topology. If I want to add rules to said topology, would I write a second script or include it within this script below? ...
2
votes
0answers
8 views

Can ArcGIS Export Web Map task print labels from a Feature Layer?

I'm creating json to create a custom printout using the Export Web Map task on an ArcGIS server (v10.2). Everything works as expected apart from labels are not showing in the generated printout. The ...
0
votes
0answers
9 views

Online libraries relocation. [on hold]

It just came to my mind now that since when developing web based application we use online libraries, we reference to them, is there a chance (if it makes sense) that those libraries be relocated to ...
0
votes
1answer
202 views

overriding showMap

This code is not working as needed. I need just to make a window with addlayer button. import java.awt.BorderLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import ...
1
vote
0answers
26 views

Create Indexes Within a View? How could I Speed up Spatial Queries Over a View?

I´m trying to add a view from postgis using QGIS, what´s facile. The problem is that it´s taking too long to load it and to perform any kind of operation, for example, as simple as counting rows. It´s ...
0
votes
0answers
12 views

Problem using EPSG:3395

in my application I use OGC:CRS83 for the coordinatereferencesystem, but now I had to change it to EPSG:3395 when I call : mQgsCoordinate->createFromOgcWmsCrs("EPSG:3395") there is nothing in ...
2
votes
1answer
17 views

QuickOSM returns no result

I am trying to download the polygons for the Umweltzone Heidelberg from OpenStreetMap using QuickOSM in QGIS. I queried by name as shown in the screenshot: The corresponding OSM script looks like ...
0
votes
1answer
13 views

Trying to update field in a feature Without “attInspector” …Using ArcGis JavScript api

I cannot find any changes in the field. Please help me out. I am attaching my code: for (var i = 0; i < features.length; i++) { feature = features[i]; feature.attributes["X"] = Value; ...
0
votes
1answer
17 views

Openlayers 3: Hover effect below top layer with labels?

I am using Openlayers 3 and I want to have a hover effect of a polygon layer below the top layer with labels. I can arrange the order of the layers that the labels are on top of the polygon, but ...
0
votes
0answers
12 views

How to have GDAL print layers of GeoPDF AND say which are raster vs vector.

My Objective: I would like to use GDAL to convert a GeoPDF. I want the vector layers as shp files and the raster layers as tif files. I want to do this in a programmatic way. The Problem: Naturally, ...
0
votes
0answers
7 views

Unable to make qgis build in cmake

I am trying to build qgis without any change in source code which i have downloaded from github using clone and i have download OSGEO4W from qgis.org and the same is installed in c drive. I have ...
1
vote
1answer
21 views

combing two layers dissolve and simplify

I am trying to combine a dissolve with a simplify polygon layer I've created. When doing conversion of layer to kml it says I have too many vertices hence the need for simplification. How can this be ...
1
vote
1answer
160 views

Leaflet SVG layer is obscuring the underlying GeoJSON interactivity

I have SVG on top of GeoJSON in my map. How can a leaflet SVG overlay be placed outside of the leaflet-overlay-pane while keeping GeoJSON in-place within the leaflet-overlay-pane? (For example, how ...
1
vote
0answers
10 views

How to run a tool from Whitebox GAT in ArcGIS?

I have a series of tools that I need to run in ArcGIS to hydrologically condition my DEM, but the first step in this process is running the Breach Depressions tool from Whitebox GAT (I have found that ...
5
votes
3answers
3k views

Python: Combine multiple Shapefiles

i have got a lot of Point-Shapefiles (r20010101.shp, r20010202.shp, r20020101.shp...). Each of them has the same amount of points at exactly the same location. In a column that is named after the Date ...
1
vote
0answers
13 views

Clip layout view to output graphics extent using python

I need to implement, within this very simple piece of code, the option that replicate the "Clip to output graphics extent" available from the ArcGIS 10.0 Export Map UI standard command. Is it ...
3
votes
1answer
25 views

Zoom to a specific location in ArcMap Viewer window using ArcObjects

I'm trying to find out how to open Viewer window (menu Windows->Viewer in ArcMap) programmatically and zoom it to a specific location. This is how I can open it: IDataWindowFactory dwf = new ...
1
vote
2answers
59 views

One-to-many join in QGIS

I am looking for a possibility to make a one-to-many table-join in QGIS. I have a shapefile with postal codes and would like to join them with survey results (more than one). In other words, there ...
0
votes
1answer
16 views

R filter shapefiles with dplyr

How to filter shapefiles data in R with dplyr and then put it in a leaflet map? not reproducible example sorry: library(dplyr) library(leaflet) library(sp) library(maptools) library(rgdal) ...
7
votes
3answers
2k views

How to clip LAS data using shapefile polygons and open source software?

I am trying to clip or filter lidar files (las, xyz) using a shapefile that contains multiple polygons. Is there open source software that can do this spatial operation? My las files are enormous, ...
3
votes
1answer
149 views

Clipping from a tiled LAS dataset with LASTools (for ArcGIS)

I have huge amounts of lidar data stored as tiled datasets per project. The "tiles" are separate LAS files based on our national map sheet setup (800 by 600 meter). To keep an overview of the data I ...
0
votes
1answer
19 views

What is the meaning of DN and DRVAL2 categorie?

I try to find the meaning of the categories DN and DRVAL2 when I used them in the command: lrenderer = new QgsCategorizedSymbolRendererV2("DRVAL2" , Categrories ); Is there any tutorial or ...
2
votes
1answer
299 views

find inner bounds of a polygon in leaflet

How can I find the inner bounds of a polygon in leaflet? I a want to plot points randomly in polygoon but when I say Layer.getBounds() I get the bounds and I can still plot the markers ...
0
votes
0answers
24 views

How to sort points in a proper order using arcpy? [duplicate]

As the picture shown in below that i have bunch of points distributed in an area. The problem is that their attribute records of each points is not in a proper order as u can see in the left bottom ...
6
votes
4answers
103 views
+200

Unable to debug Esri Addin for ArcCatalog

It was a toss of a coin whether this question is a GIS.SE or StackOverflow question... I'm going with GIS.SE because the problem seems to lie with ArcCatalog. I have several addins that have been ...
1
vote
2answers
26 views

How can I visualize a series of points on a world map?

I'd like to run a big list of IP addresses through geolocation and then display them on a map, most preferably an OpenStreetMap one. While geolocation will probably be easy using GeoIP, I'm looking ...

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