0
votes
0answers
6 views

How to extract road centreline from delaunay triangulation using open source QGis?

From some months i have been solving a problem but i can not finish. My question is: "How to extract road centreline from delaunay triangulation using open source QGis?" Actually i am using Chugiak.
0
votes
0answers
7 views

how to extract polygons from a roadnetwork?

I need to extract faces (or polygons) from my road network and calculate their areas. I mainly use Arcpy packages but even if you know it in QGIS APIs, I appreciate if you share it with me. If it ...
0
votes
0answers
4 views

Common custom toolbar for several different arcgis desktop addins using C#

Suppose, I have two arcgis desktop add ins C1Addin and C2Addin developed in c# with the following components: C1Addin: Button_1 C2Addin: Button_2 When the 1st addin which may be any of the two ...
0
votes
0answers
17 views

How to properly write a txt to use as table in ArcGIS 10.1

I just wrote a txt. to use it as a table in ArcGIS, but for some reason when I open it, ArcGIS shows it in a completely wrong way. What am I doing wrong? Here is the original content: ...
2
votes
1answer
10 views

How to save .mxd programatically?

How do I save a .mxd programatically? The project is never saved and on button-click, I want to save the project. I use SaveFileDialog to get the filepath and then use the following: IMapDocument ...
0
votes
0answers
10 views

Rebuilding a Polygon from the points within it in PostGIS

This question is an update on the problem formulated here. I wanted to redefine the border of a set of polygons, in order to "smooth it". My first approach (described in the former question) was to ...
0
votes
0answers
8 views

Geoserver security and application security separation

I am using geoserver that publises WMS, WFS services to clients. I am using geoserver services in an OpenLayers application. My application will requiere username and password authentication. 1 - ...
1
vote
0answers
3 views

Edges of Surface Difference tool output are invalid

See this image, an example output of the ArcGIS Surface Difference tool (gives cut/fill volumes): I have occasionally come across the illustrated problem where the output does not cover the full ...
0
votes
0answers
24 views

Create a New attribute table in ArcMap?

I am trying to create a new table of attributes for later purposes, in arcGIS but just an empty one, How can i do this? I also have it as an Excel format, but I don't know if there is any way to ...
1
vote
1answer
13 views

Issues with FME and the ArcInfo licence

I have ArcInfo 10.2.1, Python 2.7 and FME 2013 SP4 installed on my Computer. I want to run a python script I exported from ModelBuilder (where it ran without issues) and imported in FME as shutdown ...
0
votes
0answers
3 views

OpenLayers 3. Only one label for composite polygon

I am trying to show labels of GeoJSON polygons on hover, but now it is showing one label for each separate part of composite polygon. Is it possible to show only one label only for the biggest part of ...
1
vote
1answer
10 views

How to provide a default value in an arcpy script?

How do I provide a default value like recommended in every Arcpy script? This script is exported from ModelBuilder where every output except the last one is set to temporary and managed. I want this ...
1
vote
0answers
11 views

qgis-web-client stuck on “Loading map” on some maps

Some maps work for me to load, while some of them never do. They do load the layer names, but nothing more. The javascript console in Chrome returns this: Uncaught TypeError: Cannot read property ...
1
vote
0answers
10 views

How to produce a simple ZTV/ZVI in openWind?

I'm struggling to get to grips with openWind. I need to produce a ZTV showing a 5km radius around the chimney of a proposed industrial development. I'm not sure of the height of the stack yet but for ...
0
votes
0answers
4 views

Calculating z coordinate for longitude, latitude Google Map

I have a point (lon, lat) values. Is there any service to calculate Z coordinate of this point. Google service, OpenLayers service or others.
0
votes
0answers
8 views

QGIS WMS Server Search List of Results

In the "Add WMS" dialog on tab "Search for Server" you can put in some keywords and get a list of WMS matching this topic. My Question is: How could a WMS becomes a member of this resultlist?
0
votes
0answers
8 views

adding bing (with labels) maps to leaflet

I am using this leaflet plugin to render bing aerial map as a base layer onto a leaflet map. baseMapUrl = new L.BingLayer(bing_key); map.addLayer(baseMapUrl); But I am unable to find a way to ...
1
vote
0answers
3 views

Is it possible with Torque to show only the months where there is information to show?

I have a date column that ranges from 1998 to 2013, but each year the specific dates are always from the same three months (March, April and May). I would want to show only these months (where there ...
0
votes
0answers
4 views

Can I tile a GeoTiff up in UTM tiles for MapProxy?

I have a mapproxy instance running and so far we tiled them up into WebMercator or google tiles and leveraged them with mapproxy. Is it possible to tile geotiff up into UTM blocks instead of the ...
2
votes
1answer
23 views

Redefining the border of a polygon in Postgis

I have a PostGIS algorithm that writes a table with "pixelated" polygons, that I will call "clusters". My idea is to smooth the edges of these clusters using concave hulls (ST_ConcaveHull). To do ...
0
votes
2answers
26 views

Curved Arrows showing trade ARCGIS 10.2

I have 10 points that represent the centres of countries. I want to show with arrows the flow (some kind of trade) from one country to another. The way that my table of attributes is constructed is ...
1
vote
1answer
15 views

Geoserver WFS features query inaccurate using SQL Server Backend with spatial index

I´m using Geoserver to query features through WFS in an Web Application with Openlayers as client. The queried layer is using SQL Server as backend storage. When applying a spatial index to the ...
1
vote
0answers
11 views

Positons from GPS lanes inside a polygon

i have a lot of lanes like the orange lanes at the below picture (latitude and longitude values). Now i need all values from each lane inside the red polygon. What is the easiest way to realize ...
0
votes
0answers
8 views

Help embedding Openlayers map in Eclipse BIRT report

i have this code, it displays the zoom buttons only but it doesnt display my map. what could be the problem? <html> <head> <script ...
0
votes
0answers
14 views

Concurrency and lock challenge in Nonversioned editing in ArcMap

I use a non version SQLServer geodatabse with geometry type for spatial data storing.To do so,I have registered all layers in SDE repository and geodatabase and ArcMap shows all layers and edit them ...
0
votes
0answers
18 views

Pie Chart Slice Sizing in ArcGIS-Desktop

I have two fields I would like to show in pie charts on a map. I'm having trouble understanding how field 2 is represented as a part of field 1. If a polygon in field 2 is over half of field 1, why ...
1
vote
0answers
8 views

In arcmap how to modify time value in editor tracking fields

In my map, I have several layers enable editor tracking, but the time zone is not the same as our location time zone (GMT +8). When I try to use time slider to modify the time, I find the time slider ...
0
votes
1answer
6 views

buffer by objectid in arcpy

is there a way in Arcpy (arcgis 10.2.1) to buffer lines by selecting thier objectid? arcpy.Buffer_analysis("MY_JUNK","d:/data/ArcGIS/Default.gdb/MY_JUNK_Buffer1","10 ...
1
vote
0answers
5 views

Troubleshooting with Tiger for d3 — is this the wrong projection? Why's it look like this?

So, for the friends who have used Tiger shapefiles, clue me in on my mistake here? I suspect it's something with wrong projection or wrong conversion from shapefiles? The .xml suggests the ...
2
votes
0answers
7 views

Fastest strategy for proximity searches in SQL Server 2012

This is my very first question here, so bear with me! I'm implementing a back end for a mobile app which will have to do proximity searches to find nearby POIs (points os interest). I know it's a ...
0
votes
1answer
6 views

ERROR 000539: Error running expression_NameError: name 'shape title' is not defined

I'm trying to get the title of the shapefiles or feature classes that are in a workspace (folder or GDB), into the field as a Name in python. I know this is easier in modelbuilder by adding %Name% in ...
0
votes
1answer
11 views

Is PostGIS-2.x raster in text format (WKT) only?

I was reading PostGIS FAQ and this tutorial. From all that I can tell, it seems that PostGIS raster is a text format, i.e. WKT or well-known-text. I was wondering if PostGIS raster data are ...
1
vote
0answers
8 views

Calculating new satellite position given pseudorange measurements

I'm looking for a reference/text for an explicit formula to calculate a satellite position given pseudorange measurements from later epoch times. I've seen a lot of matlab code on the internet but I ...
2
votes
0answers
9 views

Computing the elevation angle of a GPS satellite with respect to the given receiver location

can anyone source an explicit formula for calculating the elevation angle for a GPS satellite as seen from a receiver. I can't seem to find one. Even a text reference would be great. I couldn't quite ...
1
vote
1answer
24 views

Looking for a complete list of cities by state, with area code

Our company is working on moving our sales assignments from area codes to ZIP codes, and we need some kind of dataset to help move existing assignments to the new system. Does anyone here know where ...
0
votes
0answers
10 views

ESRI Online Geoenrichment POST

've been working on an app for a presentation and we are using ArcGIS Online to geoenrich Canadian Census Dissemination Areas upon the users click. The only catch here is that some of the polygons are ...
1
vote
0answers
13 views

Splitting multiple noncontiguous polylines into multiple files

I have multiple polyline shapefiles that are non-contiguous, that is to say that each shapefile contains polylines that have breaks in them. I am looking to split each of these polyline segments into ...
0
votes
0answers
10 views

A Tool for Mapping Metropolitan Statistical Areas (MSAs) to Addresses

My and team and I ran a series of zip codes from addresses within our data set against MSA to Zip Code data found on The Census' website here. We found that a relatively high number of the addresses ...
1
vote
1answer
16 views

How to Set Label Expression Using a Long Field Type in Toolbox

What I am hoping to be able to achieve with this Tool within my Toolbox is to allow the user to input a number of layers and to set all of the labels with the same font settings (font style, color, ...
0
votes
0answers
8 views

Do the violations my variables exhibit under OLS conditions apply to the GWR environment?

This question came from this discussion thread: Screening Variables for GWR I am trying to tease out if I can apply the violation testing methodology in OLS to the GWR environment.
1
vote
1answer
11 views

Screening Variables for GWR

I was wondering if there is a list of steps I can take to screen my variables for assumption violations prior to using them in my GWR. I have watched this video tutorial : ...
0
votes
1answer
9 views

Lost Foreign key during conversion of SQLite to PostgreSQL using ogr2ogr

I want to centralise several small sqlite databases into a single, big, postgresql database. I am using ogr2ogr to convert my sqlite / spatialite (v3.7.17 / v4.1.1) databases, each one consisting of ...
0
votes
1answer
26 views

Converting JSON to GeoJSON or CSV?

How do you convert a JSON file to a GeoJSON file or csv. I have a JSON file with lat lon information, but how can I can convert this file to GeoJSON or csv. I have found some online tools to convert ...
1
vote
1answer
16 views

Can't Remove a Menu in Python Add-in

I have a Python add-in with a good amount of buttons and menus. I'm trying to remove a menu using the addin_assistant, but the menu isn't being removed from config.xml. I've tried removing the add-in ...
1
vote
0answers
32 views

Making air pollution model in QGIS [on hold]

Im writting bachelor thesis about air pollution from point source and i want, to put it to GIS. But i dont know really how ... Im working with Gaussian plume model, so I have pollution concetration ...
1
vote
0answers
15 views

How to merge elevation from a raster image onto a shape road network with QGIS? [duplicate]

I have a shape file with Stockholms road network and a raster image with elevation data from the same area. Is there any way to merge the two somehow, either by adding the slope direction as ...
3
votes
0answers
23 views

demers cartogram

How do you make a demers cartogram from a shapefile/topojson/geojson? I have tried scapetoad and indiemapper and i can not duplicate what you find on the links below. ...
0
votes
0answers
4 views

OpenLayers 3. Problem with displaying GeoServer WFS layer

I am trying to add polygon wfs layer using JSONP format, but something is wrong here. Console shows no errors and this layer, and by countries.getSourse().getFeatures() I receive just[]in jsonp ...
2
votes
1answer
32 views

How to merge shapefiles of two countries with QGIS [duplicate]

I want to merge the shapefile of Nigeria and Cameroon admin level 1. I downloaded the files from gadm but I cannot merge the files with QGIS or find a shapefile of Africa having countries at states ...
1
vote
0answers
35 views

All map services display pink tiles

I have implemented mapserver in Ubuntu 14.04 with postgresql 9.3, postgis and imposm using GitHub tutorial. After completing the tutorial all map services display pink tiles not map info. i was not ...

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