2
votes
1answer
1k views

How to meassure the length of common edges between polygons?

I have a shapefile that contains several polygons which in fact represent the limits of several counties. My task is to find each length of each shared border. So in other words I want to know how ...
2
votes
3answers
576 views

Is there a good guide out there for setting MapServer up on an existing windows apache server?

I have been interested in trying out MapServer and have no problem setting up a windows development box. Seems like all the MapServer implementations on Windows include Apache, php, mapserver, and a ...
2
votes
1answer
485 views

Problem with georeferencer in Qgis 2 64bit installation

I tried to use the georeferencer in the new Qgis 2 64 bits for windows. I tried with the standallone installer and with the OSgeo4w installer. The problem is when I load the raster that I want to ...
2
votes
3answers
2k views

How to split a line every x meters? [duplicate]

I have a line that I ultimately want to split up into points. The points should be every 100 meter along the line. So I don't want to extract the nodes. Are there any OpenSource (QGIS, Python) tools ...
2
votes
2answers
285 views

After re-open of old project file, several layer selections no longer available

I'm new to QGIS. I created a QGIS project, loaded 1 to 3 shapefiles via Add Vector Layer (from 2008 TIGER/Line Shapefiles http://www2.census.gov/cgi-bin/shapefiles/state-files). The maps look fine ...
2
votes
1answer
997 views

Openlayers 3 map displays on a Desktop, but will not display on a Mobile

I have the code shown below that works perfectly on a desktop, but will only display the OSM layer on a mobile device. Am I missing something obvious? My understanding is that it should work on both ...
2
votes
2answers
956 views

GDAL Conversion of US Topo GeoPDFs

I've used GDAL_translate with "--config GDAL_PDF_LAYERS" option to convert US Topo GeoPDFs to GeoTIFF and it works great for creating collarless topos based on the new format. However, I can't get it ...
2
votes
1answer
534 views

How does one use leaflet layergroups with CartoDB layers?

I'm trying to use leaflet layergroups with a cartodb layer, ala: http://leafletjs.com/reference.html#layergroup but haven't been able to successfully do it. This is what I have so far: var map = ...
2
votes
1answer
241 views

QGIS print composer, DMS grid when SRC is not in decimal degrees

I have a QGIS project where the layers are in projected SRC, and when I go to the print composer to draw the grid, the units are in millons of meters, and I want them in decimal degrees. Is it ...
2
votes
2answers
1k views

Why is Format of output data grayed out on Save As dialog for Rectify?

I started georeferencing and I could not save my new "rectify" file, I don't know if is because of the raster or I did something wrong. Then I find out that my control layer is not accurate, it doesn'...
2
votes
2answers
362 views

Add OpenLayers layer from QGIS's Python console?

On QGIS 2.4.0-Chugiak the Openlayers plugin is found under Web menu rather than the Plugins menu. How can you use the Python console to add a Openlayers Google Maps layer? The following code give us ...
2
votes
1answer
399 views

Can we use existing planet database for Nominatim

i have imported data from the OSM to PGSQL using osm2pgsql for generating tiles, and now i need to add Nominatim support also, this Nominatim requires the same OSM data. can we use the existing ...
2
votes
2answers
596 views

How likely is it that Smartphone Camera GPS coordinates are wrong?

According to the coordinates printed directly on this photo of my late son Kelvin here: https://www.dropbox.com/sc/w6tvwuvbosuh9rk/AADzT-3vDXcFQ9LnKK1BYMZUa ...and the Exif data from the .jpg: ...
2
votes
2answers
4k views

Assign unique ID to each polygon

I feel like this should be really simple and I am missing something. All I wish to do is assign a unique ID to each polygon since I have multiple identical FID values. In MS excel I would simply type ...
2
votes
1answer
167 views

How to create Multipart Line in ArcPy?

I am developing some script in where I want to create custom multi part line geometry. For example: I have one array of points a,b,c and second array of points e,d,f. I want to create one ...
2
votes
1answer
407 views

Listing Elements or Datasets of Layer gives ERROR 000840 value is not Feature Layer?

I used Ar5cPy to do batch processing of Network Analyst - Make Service Area layer of thousand of stores. Everything went well except now, I am stuck with layer (.lyr) files and I would like to ...
2
votes
0answers
194 views

GeoDjango order_by('distance') not working as expected?

Using GeoDjango, I am trying to sort a list of users based on the distance from a point. It does generate a list, but its not ordered by distance, though I specify that in my query. This is the query ...
2
votes
1answer
251 views

Can I cross the dateline in CartoDB?

I've created a lovely route map in CartoDB, but one of the lines crosses the dateline (from Colorado to Guam, FWIW) and finds its way there by hitting the dateline north of Alaska, bouncing back ...
2
votes
1answer
398 views

Sextante in Qgis 1.9 alpha on Ubuntu can't find saga gis 2.1

I am using Qgis 1.9 on Ubuntu 13.04, Sextante is a core part of qgis now. I am trying to access the SAGA 2.1 libraries through qgis and I keep getting a popup window that says SAGA is not installed. I ...
2
votes
1answer
363 views

Problem installing QGIS Valmeira on Windows 7 Professional 64-bit

I have been having trouble installing QGIS Valmeira on Windows 7 Professional with SP1. When I installed to the default directory C:\Program Files\QGIS Valmiera\, many of the predefined coordinate ...
2
votes
2answers
355 views

QGIS equivalent for ArcMap join for purpose of distances from points to polygon?

It is relatively easy to calculate distances from points to a polygon in ArcMap by doing a join and selecting the option for creating a field containing the minimum distance information. i.e. it ...
2
votes
3answers
2k views

Accessing coordinates of polygon

I have designed a polygon in a web page and the coordinates are stored in the database of the type polygon. However when I check the database, I find GEOMETRY - 120B under polygon field. What does ...
2
votes
3answers
2k views

Is it possible to export cross sections from QGIS to HEC-RAS

Is it possible to create cross sections along a river in QGIS and then export the data to HEC-RAS? Thanks
2
votes
1answer
888 views

Split polygon into several smaller polygons in QGIS

I have a layer of polygons depicting response boundaries, I would like to break each of these polygons into a number of sub-polygons. As this is for an exploratory project, the polygons themselves ...
2
votes
2answers
179 views

Digitized Shapefile manually using wrong projection: how to fix it?

I have a raster in correct projection. I used shapefiles, and marked objects (manually), but I found out that my vector layers have different projection, so they have different size and position. Is ...
2
votes
0answers
601 views

Trouble with Python plugins on QGIS [closed]

This question has been bugging me for a while now, and I still haven't managed to solve it, so I'm giving it another go, hopefully someone may help me out. I've been having problems loading several ...
2
votes
2answers
359 views

How to calculate F_NODE and T_NODE fields in a street shapefile

I have developed a Streets shapefile from papermaps and using GoogleEarth. Can someone tell me a very simple method to bring values in F_NODE and T_NODE fields in my attribute table, so that I can ...
2
votes
1answer
192 views

Databases supporting intersection of multipolygons and a set of points

Currently we use PostGIS to store thousands of MULTIPOLYGONs and we can then use ST_Intersects to return any that rows contain any point in an input collection of points. Are there any other open ...
2
votes
2answers
817 views

RESTful Geoprocessing Service Request returns empty Result object without errors

This is a bit difficult for anyone here to test as our ArcGIS Server 10.2 instance is behind a firewall. I'll try to present all the necessary information, but feel free to ask for more and I'll ...
2
votes
1answer
392 views

ESRI Raster Remap with Decimals

I have a requirement where the user would like to see the output value in a raster as a decimal. The user will input a series of ranges with a cost associated to them. For instance 0-5, 1.20 ...
2
votes
3answers
1k views

Mosaic to New Raster tool fail

I'm trying to merge 24 DEM files, after applying the tool (Mosaic to New Raster) only 11 out of the 24 merged. All the original files are in the same projection, pixel type, band, etc. I also ...
2
votes
0answers
1k views

How to add multiple nested node in GeoExt

I have following codes, but i want to add severel parent>child>chill>child>child (4 level inside) nodes with all check box options (for user choice) in the tree panel, in fact sum of all these (parent ...
2
votes
2answers
913 views

Zoom to see entire MapLayer in Bing Maps

If I have a MapLayer that I'm applying to Bing Maps where I have a list of coordinates, how can I zoom to see the full MapLayer (dynamically zoom to the proper size) and toggle between seeing the ...
2
votes
1answer
694 views

The minimum bounding circle of geometry that crosses the 180th meridian

Background: I've been given a task where I have to calculate the minimum bounding circle of Alaska (for the purpose of running a Roeck test). I'm using the Census' state level geometries available ...
2
votes
2answers
3k views

How to switch Map Units on Data Frame Properties back to Feet in ArcMap?

Using ArcView 10.1, I can not switch the Map (Units) nder Data Frame Properties to Feet. It is currently at Decimal Degrees. Display can switch. How do you switch it back to Feet?
2
votes
1answer
304 views

Efficiently check for equal adjacent values in raster calculator

I have a raster consisting of integer values in each cell. I want to check every adjacent cell in a 3x3 grid to see if any one of the adjacent cells has a value EQUAL to the center cell, and if so, ...
2
votes
3answers
553 views

Geodesic measurements for short distances throughout US?

My ArcGIS experience has been limited to working on large-scale maps with planar projections. I'm moving to a project in which I want to calculate the distance between pro sports facilities throughout ...
2
votes
2answers
741 views

Add multiple Layer files in subdirectories to mxd using python

I have more than 300 layer files located in many sub-Folders and sub-sub-Folders. All Sub Folders are located in one large directory.I read Use python to add layers to TOC and I try, with arcpy, to ...
2
votes
3answers
1k views

How can I work with very large shapefiles (~1 GB) in QGIS?

I'm performing some basic spatial analyses on a large database of traffic injuries in California between 2003 - 2011. Because the dataset is large (nearly 1 GB of points), I'd like to first cut it ...
2
votes
1answer
446 views

QGIS Metatools error

I haven't been able to successfully use the QGIS MetaTools plugin for describing metadata. Has anyone used it before? When I try to create metadata for a shapefile, the plugin creates the xml file but ...
2
votes
1answer
166 views

SVG Issues in QGIS API

I'm using QGIS-2.4.0 to developing an application. I created my own custom MapCanvasItem for showing SVG. It is great to load a SVG from symbol library that QGIS provides(such as d:\QGIS Chugiak\...
2
votes
2answers
244 views

Convert point file to polyline but not joining every set of points in ArcGIS10

I have a dataset that looks like : OBJECTID Shape KP DESCRIPTION EASTING NORTHING 1 Point 0.04 Span;Start 525112.2 6728715.4 2 Point 0.0506 Span;End ...
2
votes
1answer
2k views

How to find the intersection point of polygon geometry and multilinestring geometry in postgis

I have a polygon geometry and multilinestring geometry. How do i find the intersection of both these geometries. Both the geometries are in same reference system. Does st_intersection gives me the ...
2
votes
2answers
453 views

Cannot Install QGIS Mapserver On Ubuntu 12.04

I'm trying to install qgis-mapserver on my ubuntu 12.04. I just installed qgis desktop 2.6.0-brighton successfully. Here is my steps when installed the desktop : sudo apt-get install python-software-...
2
votes
1answer
736 views

Why does intersect not calculate polygon areas?

this is strange: I intersected 2 shape-files and the resulting shape does not contain the Shape_Area and Shape_Length of the intersected polygons. Instead the field Shape_Area contains the polygon-...
2
votes
1answer
401 views

Lost relation when importing from OSM to PostgreSQL with ogr2ogr

I am currently trying to import all administrative boundaries (countries, states, cities, etc) from OSM. I downloaded a small file from Geofabrik (Corsica), in order to run my tests. I understand ...
2
votes
2answers
366 views

MultiLine field-name label referencing

A labeling routing (which is updated often) is being implemented via pyqgis and a QComboBox. The attached code below worked great, that is until needs for narrowed column headers spawned the use of ...
2
votes
2answers
2k views

Drop Markers and MarkerCluster together from database

I've been working on my map which gets it's details from a MySQL database. I use MarkerCluster Plus to cluster my markers but would like to add the drop animation to it. I found this thread, but ...
2
votes
1answer
3k views

Popup from multiple services

I am trying to have one infowindow/popup show from multiple services. I have successfully added the second service to my code, however, only 1 result will display. Ex. if I am at full scale, only ...
2
votes
1answer
124 views

Tracking which LiDAR data tiles have been delivered

My company works with LiDAR data for large electrical transmissions systems (thousands of miles in one project). We model the transmission lines and do analysis using CAD and GIS workflows. We break ...

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