0
votes
0answers
9 views

PostGIS tiger geocoder installation trouble

I am getting the TIGER geocoding feature set up on my windows 7 64 bit box (PostGIS 2.1; Postgres 9.4). I followed the steps outlined here to generate the batch scripts and ran them last night: ...
0
votes
0answers
1 view

How to determine area from polygon?

I have to digitize one polygon that can accommodate 10million.cubic metre of waste and the study area is completely flat surface. How to determine area?
0
votes
0answers
2 views

Style function called twice

I wonder why my style function is called twice for each feature added to the layer. This is the code I have: var features = new ol.Collection(), layer = new ol.layer.Vector({ source: new ...
0
votes
0answers
2 views

Calculate average travel time on network

I have 200 points of emergency centers across a national road network, is there a way to calculate the theoretical average response time nationwide just from these two inputs? Thank you, Ahmed
1
vote
2answers
2k views

How can I “reset” SketchUp origin after importing DXF with “Preserve Drawing Origin” option enabled?

I can successfully import all of my 3D DXFs into a common location so that they are referenced correctly (in reference to each other). TO do this I simply check the Import DXF "Preserve Drawing ...
2
votes
2answers
45 views
+100

Where can I find raw LiDAR data for European Countries?

I'm looking for LiDAR data in laz or las format preferably from an FTP site. Does anyone know which countries have that data available to the public? From my research it doesn't seem to be easy to ...
1
vote
1answer
180 views

How do I get layer feature type in OpenLayer?

I am new in openlayer and I wanted to add a modify feature function in my application, for this I need to know the feature type of the layer (i.e Point, Polygon or line). Because as per the feature ...
0
votes
0answers
7 views

Creating Fence Diagrams from Electromagnetic (EM) Conductance Survey

Has anyone seen fence diagrams created in GIS for Electromagnetic Conductance surveys? I am going to be attempting this soon and have a couple pieces of literature as reference, but they are geared ...
2
votes
0answers
34 views

How do I speed up testing debugging when I am loading a large module as part of my program? [on hold]

I'm using PyScripter to do some python geocoding automation and I'm coming across the situation where I am waiting several tens of seconds for a large module to be imported. This is very inconvenient ...
0
votes
2answers
33 views

Failure of the function “rasterize” in R: NAs or no slots

I have some problems to convert a shapefile into a raster. I used the function rasterize (package raster) but all raster values are equal to NA. Following the answers to this question rasterize ...
1
vote
2answers
18 views

Qgis Shapefile Lines contain no data in Attribute Table

I am trying to make a shapefile line contain all the data that the GPX file has. So i load the gpx file into Qgis, (prompts me for tracks, waypoints, trackpoints, routes, etc) When i choose ...
1
vote
2answers
2k views

Force reload of Tiles in Layer

I want to display an indoor map. My problem is that when I change to another floor (the URL changes) the tiles are not refetched. The following code is used: var indoorSource = new ol.source.XYZ({ ...
5
votes
1answer
37 views

How to group 10k points into closest pairs?

I was first faced with a problem of grouping 1000 pairs into unique pairs to minimise the total distance - since this was a small number I solved it using linear optimisation: Part 1 - Basic/Naive ...
2
votes
1answer
429 views

Problem when executing Dissolve method in ArcEngine

I'm always having a problem in GP.execute() when trying to execute this method. Here is my code: Friend Function DissolveFeatures(ByVal pInFLayer As ESRI.ArcGIS.Carto.IFeatureLayer, ByVal ...
1
vote
1answer
327 views

OpenLayers not displaying map from WMS layer in GeoServer

I've adapted the working example from geo-solutions website but still it is not working, it seems the problem is with jetty. below is the previous question I'm using Geoserver with jetty web server, ...
-2
votes
0answers
12 views

How to convert an XML to Shapefile polyline

<?xml version="1.0" encoding="utf-8" standalone="yes"?> <ci nc="BMSKDMA10" nl="BMskDMA10" mt="6" ct="DM" dtt="17342" dtu="15/01/2016 09:47:29"> <tr la="33.5510900" lo="-7.5741300" ...
1
vote
2answers
39 views

Using Python to select records by date field

I am trying to write a python script to select records created within the past 7 hours (date field - database time) using a where-clause within arcpy. The table is ArcSDE database (Microsoft SQL ...
2
votes
2answers
2k views

Programmatically converting arbitrary XML data to shapefile?

Based on the answers below I decided to do some programming. I'll be using GEOtools for this, a java lib: http://www.geotools.org/ I have the following XML: <shapes ...
15
votes
3answers
452 views

Are there any books about the psychology of cartography?

I have the daunting task to do a seminar about the psychology of cartography. I have zero training in this field and would like to ask if anyone has ever tackled this angle?...I would like to ...
1
vote
1answer
235 views

“construct points” troubleshooting

Apologies for the potential simplicity of this problem but I just cant find a solution! I need to create a series of points along a line at a specific interval. I am using ArcMap 10.2.1 and the ...
3
votes
1answer
706 views

How to calculate the average velocity over the flowpath length?

I’m working on building a GIS based groundwater travel time distribution (TTD) model similar to the one developed by Schilling and Wolter (2007) ...
0
votes
0answers
20 views

Where can I purchase private LiDAR data?

I'm looking for privately owned LiDAR data sources. Does anyone know of companies/counties/states that sell their raw LiDAR data? I know there are free LiDAR sources out there, but I'm interested in ...
3
votes
1answer
176 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, ...
0
votes
0answers
13 views

(python) distance between a point and a list of segments

I have a line (made of multiple adjacent segments) and a set of points, and I want to find all the points which are within a given distance (40m mainly but could change) from that line. segments ...
7
votes
1answer
118 views

In ArcMap, use python to disable “Scale map elements proportionally to changes in page size”

I am changing sources on MXDs in differents offices using ArcPy and ArcGIS 10.0. As observed here, the printer settings revert to the default printer when the instruction mxd.save() is sent. Losing ...
1
vote
2answers
2k views

OSR Python testSR.ImportFromEPSG(4326) returns empty spatial reference

This is empty using Python .ImportFromEPSG(4326): import osr #this fails: testSR = osr.SpatialReference() testSR.ImportFromEPSG(4326) print testSR.ExportToPrettyWkt() #why did the import from EPSG ...
1
vote
1answer
66 views

Adding geoserver vector wms layers in openlayers 3

I have been trying to add my wms vector layers in openlayers 3 but it isn't working, i guess there is a problem with my script. Below is my javascript code: <script> var osmLayer = new ...
0
votes
1answer
23 views

Creating spatial population heat map

I have some data that contains crab males population based on latitude and longitude. I am trying to plot the population distribution on map (not point density). For example I like to show which areas ...
1
vote
2answers
34 views

IOError: “[u'Hospitals',u'Parcels',u'Roads']” does not exist

I was wondering if someone could help me figure out what's going wrong with my code. It's at the very end of a code that, once a link to a geodatabase is inserted, will print the name, directory, ...
0
votes
1answer
189 views

BuildCircleMbr with 1km of accuracy - spatialite

I want to create a Circle MBR in spatialite of 1km for example from lat/lon in WGS84 I use BuildCircleMBR but i am not able to generate this well. My query SELECT BuildCircleMbr(40.0,-4.0,1, 1000) ...
2
votes
0answers
22 views

How to build a query/expression to select specific points within a buffer? (in QGIS)

I have a point layer in QGIS. Each point represents a tree and each tree has information about its height as an attribute. I would like to build a query/expression to select all those trees that have ...
5
votes
0answers
44 views

1-center and k-center problem / maxmin facility problem in Post

is there anybody who has already solved the 1- and k-center problem within PostGIS (optionally with distance metric obtained by pgrouting)? References: 1-center problem in Wikipedia and graph ...
3
votes
1answer
52 views

Inconsistent results in ST_Distance

I have been playing with the ST_Distance function available within PostGIS and to my surprise, I have encountered some rather strange behavior... In the simplest setting, I have just two tables N and ...
3
votes
2answers
433 views

Openlayers map WMS stretched by latitude

I am working on a small javascript application for displaying map with WMS layers from 2 servers. The problem is, that image is stretched by latitude, it is wider, as it should be. This is is how it ...
1
vote
2answers
50 views

CRS is not correct, how to define it?

I have the correct coordinates in a excel file, but when I import the file, the point always goes to the wrong place. (I need it in Croatia, and it puts the point in Africa) I've tried chaging CRS ...
2
votes
1answer
18 views

Getting different pixel depths from output raster when done in ArcMap versus Arcpy?

When I use 'Plus' in Spatial Analyst to add together two 8-bit unsigned rasters (pixel values 0-100) the output raster is 8-bit unsigned (pixel values 0-200) but when I try and do the same thing ...
1
vote
0answers
15 views

Location allocation Road Block- Unable to “Solve”

Scratching my head as why I can't figure this out. Software: ArcGIS/ArcMap 10.3.1 with network analyst extension Objective: Perform location-allocation services, based off of 2 Required Facilities ...
0
votes
0answers
18 views

Spatial index in R - Performance enhancement on geospatial processing [on hold]

In my Geoinformatics studies, I often stumbled over the usage of spatial indices in spatial databases like here. However, I wondered if there is any possibility to use such indices in R in order to ...
2
votes
0answers
13 views

How to calculate false easting/northing for Lambert Conformal Conic projection

I'm defining a new GRASS location using the Lambert Conformal Conic projection. My understanding is that the values for the standard parallels and central meridian are dependent on my area of ...
1
vote
0answers
35 views

Add a Delimited Text Layer in QGIS [duplicate]

Does anyone know how to put manually decimal coordinates in QGIS 2.12.3 Lyon? I have the georeferenced topographic map. I've tried to add feature point and then change the coordinates of the point but ...
2
votes
1answer
16 views

Stop snapping from occuring with inserted text?

I'm having trouble with text and scale bars in layout mode on arcgis snapping. I want to move the text freely. It's not necessarily snapping to inserted margins either. I've tried guides and it won't ...
1
vote
2answers
16 views

Loading data in existing dataset in ArcGIS Online?

In ArcGIS online (AGOL), is it possible to load data (shapefile or geodatabase) into an existing layer? The map layer is shared and editable.
3
votes
1answer
222 views

Trying to use Tkinter to open dialog box in ArcMap

The following script works great from the command line but crashes from the pythonaddin: import Tkinter import tkFileDialog root = Tkinter.Tk() root.withdraw() pathtest = ...
1
vote
2answers
17 views

How can one retrieve all the raster cell values for Kernel Density output?

This question is related to the replies in this earlier thread (How to interpret GRASS v.kernel results?). I am new to GIS mapping (arcGIS) and have been trying to work with the Kernel Density ...
2
votes
1answer
54 views

Concatenate values using spatial join in QGIS?

I have a layer (SQLlite) of city lots and would like to accomplish the following: For each city lot, concatenate the list of unique lot id's which are bound within a radius of 30m from the given ...
1
vote
1answer
12 views

export more than one but not all attributes with qgis2web

Using the qgis2web plugin: Is it possible to select more than one but not all attributes to be shown as popup? I can select all attributes or only one attribute to be shown. but not for example two ...
2
votes
0answers
11 views

Use Geokettle to Transform file geodatabase data

I would like to use geokettle to transform my file geodatabase data into something else (most likely postgis). Admittedly I am very new to ETL but I am absolutely stumped when I try to define an ...
1
vote
1answer
138 views

Create shapefile based on geojson data with geotools (Java)

I'm using Geotools 14.0 for Java and I'm trying to generate shapefile based on data from GeoJSON. Here is my code: try { String url = "geojson.json"; File geojson = new File(url); ...
1
vote
0answers
20 views

Building QGIS 2.8.6 on Win 7 32bit?

I'm trying to build QGIS 2.8.6 on Windows 7 32 bit using MSVC Express 10. The build process completes without errors, but with a bunch of warnings. When I run the qgis.exe after installation, it only ...
3
votes
0answers
52 views

Merge n number of adjacent polygons

I have over 17,000 individual polygons. I want to merge two adjacent polygons so that I finish with approximately 8,500 polygons. The polygons need to be merged based on location, merge two adjacent ...

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