3
votes
1answer
2k views

Read and Export OSM Road Data as a Network of Road Segments [Adjacency Matrices]

I wish to extract from an OSM file a road network, and export it as an array (adjacency matrix) where the nodes are the road intersections and the edges represent the road segments. I don't want to ...
2
votes
1answer
160 views

Aligning layers with questionable metadata in SW Ontario

After making my best efforts to read/try everything I can on this forum and elsewhere, I unfortunately have to contribute to the wide literature of "my layers aren't aligning" questions. I am working ...
1
vote
1answer
1k views

Convert polygons in shape file to a numpy array?

I have a shape file containing a number of polygons and all attributes being text. I'm trying to import the polygons into numpy as an array where each polygon is represented as unique values. I ...
4
votes
1answer
219 views

Simple way to compare ranges and distributions of species, looking for correlation and differences between ranges

As a biology student just beginning with GIS, wondered if someone could give me an idea of what tools to go about using to compare the range of 3 species that have trophic effects on one another. I ...
2
votes
2answers
370 views

Change WMS symbology

Is it possible to change the symbology of a WMS from external developers - I'm harvesting WMS and the symbology is very messy and unclear when some are viewed together - can I change it? Any help ...
1
vote
1answer
3k views

Using a Select By Location in Python and Calculating a field based on what State Plane a point falls in

Here's what I have so far. Do I need to make another feature layer based on the selection? import arcpy arcpy.MakeFeatureLayer_management(r"PATH TO THE POINT", "point_lyr") arcpy....
1
vote
1answer
407 views

FME: how to extract the coordinate of the North West corner

In an FME translation from a polygon geodatabase feature class to a DGN I am trying to place a label in the top left corner of a box. I have tried using CoordinateExtractor to find the coordinates of ...
2
votes
4answers
817 views

Print City Map in High Resolution with TileMill (OSM Data)

I'm rather beginner in Print Map and GIS. I'd like to print the map of my little city using the data in OpenStreetMap. I've got an environment(local) with OSM DataBase and I'm using TileMill to ...
1
vote
1answer
51 views

Simple pixel analysis [duplicate]

I am very new to QGIS and I simply have two tif images which I need to do pixel analysis on so I can compare the change in vegetation over time. I have no idea how to go about this and if anyone has ...
2
votes
2answers
512 views

How to install Spatialite-GIS on Windows?

I was wondering if there is a way to install Spatialite-gis on a Windows & machine? I have found may posts and links about this, but I have yet to find an installer for spatialite-gis. This ...
0
votes
1answer
95 views

Using attributes of a polygon in one layer to identify polygons in another

So I'm in the process of developing a web application, I am using open source tools so qgis, postgis, play framework for the web app. And I have come across an interesting problem that I'm trying to ...
1
vote
0answers
42 views

Creating contours from partial data set

Is it possible to create contour lines based on part of the points and not the entire dataset?
0
votes
0answers
35 views

Labeling mulitple interests stacking problem [duplicate]

I am using ArcView 10.1 and am using this code to no avail in the Labeling Properties [Company_Ne] &VBNEWLINE& [Exp_Date_O] I know there is a way but am not familiar with the scripting for ...
2
votes
1answer
479 views

Getting null values using Point sampling tool in QGIS 2.0.1

I would like to obtain the information of a raster layer at some points. Apparently the Point sampling tool does the job. I have used this tool, and all the raster values extracted at specific points ...
1
vote
1answer
2k views

How do I insert a geometry as WKT to SQL Server Spatial with PHP?

I have a web mapping application built on Bootleaf (Leaflet + Bootstrap). Using the leaflet Draw plugin the user can create a polygon on the map. I'd like to insert that polygon into a geometry ...
1
vote
1answer
53 views

QGIS 1.8 Project in 2.0.1 Bad Layers

I have a confusing problem with a project generated in QGIS 1.8 when trying to open this on a new windows pc with Darfour (same OS, Win7) The hard drive including the project has been moved from old ...
4
votes
1answer
378 views

how to make public transportation map?

I have collected the public transport routes and i want to map a map that looks like this. My problem is i am not able to show the shared segments as parallel lines. I have not been able to find good ...
0
votes
1answer
148 views

Open all popups OpenLayers

I have some WMS layers with attributes and I want to show some info when I click on some of them. Currently I'm using: info = new OpenLayers.Control.WMSGetFeatureInfo({url: 'http://localhost:8080/...
0
votes
1answer
106 views

How to write sderaster commands

I am trying to receive information about a Raster image in an sde Database. I am using the sderaster -o list command which gives me the error "ERROR: No [opotions]". I have tried to enter all the ...
1
vote
1answer
735 views

Import a .las-file into QGIS 2.0.1? [duplicate]

I want to import a .las-file into QGIS 2.0.1. My guess is that I need to convert it into a format that is readable in QGIS. But how? I tried using LASTools. I downloaded it, but I don't understand how ...
12
votes
9answers
8k views

Is a master's degree needed for a GIS career? [closed]

Currently I'm on the 5th year of education at the university (Dept. of geography, specialisation - "GIS"). In my country (Belarus) we have a system of education that differs from the majority of the ...
2
votes
1answer
630 views

Splitting strings into new rows, retaining geometry

UPDATED BELOW I have 9 shapefiles, each shapefile has 700,000+ rows and I have roughly 12 attribute fields in each shapefile. There are three attribute fields, common to every shapefile, that I am ...
0
votes
0answers
228 views

updating the extent automatically in the print composer

Just started using QGIS (after trying what I need to in GRASS). Using the Print Composer, I've put down a map which is based on the map in my map canvas, which is what I'll want to print. Then put ...
1
vote
2answers
2k views

Configuration for GeoWebCache in Geoserver 2.4.0

I have developed a web map application by using Geoserver 2.4.0 and tomcat 7 in Windows XP. I have tried to configure the GeoWebCache for WMS layers to speed up the service but unfortunately it didn'...
2
votes
2answers
474 views

Can I use the LEFT (string) operator in ExecuteSQL()?

In QGIS I can use the LEFT operator on a dataset like this: LEFT( "Name2",3) ='031' What is the syntax for using this expression with ogr in python? Isn't this the right syntax? a=water....
0
votes
0answers
297 views

Mapscript. Converting pixel coordinate to latitude longitude for postgis

I have a map created with mapscript. It is a 2D (PNG format) that's being shown on a web browser. I want to get the lat/long coordinates whenever the user click on the image, and then save it in my ...
1
vote
1answer
312 views

Buffer Zip Region Polygon with GeoTools

What I want to achieve is to buffer a zip region geometry with a distance in meters and than get the coordinates of the new (expanded) polygon. The original geometry polygon is parsed from a kml file. ...
3
votes
1answer
1k views

*.lyr to *.style conversion in ArcGIS

Do you know how it's possible to convert a layer symbology or an *.Lyr file to an *.style file? Thanks, Jérôme
1
vote
0answers
104 views

Custome QGIS application with WPS and GDAL/OGR

I have basic question on how to start a project with QGIS. There are two kinds of users, and they are supposed to sign in (Login in) before they start using so that depending on the user type the QGIS ...
3
votes
4answers
9k views

How can I remove default zoom in/out [+/-] buttons from openlayers to keep the navigation bar on?

I want to remove the default zoom +/- buttons from openlayers. Here is my code <script type="text/javascript"> var map, ia_wms; function init(){ map = new OpenLayers.Map('map', {...
1
vote
1answer
219 views

MapInfo cannot join after deleted some rows with “del”

I tried to join my table with another one, with the update column. But it gives me an error, that it cannot be updated. Actually it does update the table to a certain point. I deleted some rows ...
1
vote
1answer
168 views

Can't open Spatialite plugin in QGIS

After installation, I got the error messages below when I click the Spatialite (V.7) Plugins: -------------------------------------------------------------------------------------- An error has ...
3
votes
1answer
175 views

Add more info in the attribute table after executing “Line intersection” in QGIS

I have executed the "Line intersection" tool on a road shapefile. This is under Vector > Analysis Tools > Line intersections. I get an output with attribute table having just two columns: type_1 ...
0
votes
1answer
546 views

How to make it clickable kml file that has been google maps

I have uploaded a kml file into google maps. Now i need to make it clickable. Can there is a way to do this. or I need to upload by code only?
2
votes
1answer
2k views

How to use PyQGIS ( Python QGIS API ) to open/close Update Drawing Order checkbox in QGIS2's Layers (Legend Interface)

Thanks qgis 2, the Legend Interface (layers dockwidget) now has Update Drawing Order check box on right-click mouse context menu. I think this feature can let user temporally closes rendering, then ...
3
votes
1answer
70 views

What alternatives are there for hosting shapefiles too large for GeoCommons?

I've got a ~500M shapefile I'd like to place where it is publicly accessible and can be found via search. Specifically this dataset is the Bernalillo County, NM assessor parcel and tax database, which ...
0
votes
1answer
111 views

How to view attribute information in shapefile using QGIS? [closed]

I have a polygon shapefile (*.shp) and want to view its attribute data. How can I do this using QGIS?
1
vote
0answers
265 views

ArcGIS Query Layer SQL Server Performance Issue

I'm experiencing a performance issue with ArcGIS Query Layer using non-sde Sql Server 2008 R2. Actually, I'm using a rather comprehensive view that pulls and joins data from multiple databases and ...
2
votes
1answer
831 views

How to define polygons overlapping each other?

I have a shapefile of landuse in different catchments. I want to calculate the percentage of each landuse category in each catchment using Tabulate Intersection. Before using this tool, I had ...
2
votes
1answer
619 views

Is it possible to query raster from ArcGIS Server 10.1 REST?

I have a map service that contains a SDE raster layer and served out by ArcGIS Server 10.1. Is it possible and how to query through REST service on the raster layer? Basically what I want to do is to ...
2
votes
1answer
795 views

Why is my OnChangeFeature event not firing in my parcel fabric editor extension?

I have an edit extension that listens to events that happen during an editor session. I have wired it like so: void Events_OnStartEditing() { //Since features of shapefiles, ...
2
votes
0answers
38 views

Progressor bar for network analyst solve?

I'm using ArcGIS 10.2 and arcpy and am wondering if anyone has a method for displaying an accurate step progressor bar during a network analyst solve? As far as I know its not possible to set the ...
1
vote
0answers
350 views

Qgis web client search

I install Qgis web client on windows 7 and it's working fine! Now I wont to setup search feature! First I added line in Apache config file: -LoadModule wsgi_module modules/mod_wsgi.so In ...
0
votes
1answer
31 views

Maintain Feature Data without Creating It

I work in City Gov. We utilize County Assessor data (Parcels) as they are updated from the Assessors office. Currently we store then in our Enterprise SDE system. As we get new updates, we have to ...
0
votes
0answers
38 views

Linking Google Sheets with PostGIS

I am curious if there is a way to link a PostGIS table with a Google Sheets? Both tables (Post and Google) have a unique ID that can be used as a linkage. I am hoping to be able to build a view that ...
0
votes
0answers
301 views

Estimating sunlight hours from slope, aspect, and latitude

I'd like to estimate annual sun hours (or insolation, or solar radiation) for 4 points, 1 each on the four sides of the summit of a hypothetical flat-sided mountain. I have slope and aspect for each ...
2
votes
1answer
248 views

Setting time animation by number of frames

I'm trying to use the ArcGIS 10 animation system to produce a time series of points by year. There are only 65 years in the dataset, and I want to make it so there is only one frame per year. I have ...
1
vote
1answer
235 views

How to use overview map with atlas plugin in QGIS 2

I'm using atlas plugin to batch generate maps. I insert an overview map but it doesn't get updated over iteration and generation of maps.Is it possible? If it's not, is there any alternative?
1
vote
2answers
2k views

Cannot import gdal_array

I attempted to use GDAL without installing due to not having rights to install on this computer. I managed to get several gdal modules working, but when I attempted to use ReadAsArray() I received the ...
4
votes
2answers
2k views

Extend Polyline in ArcGIS without intersecting line

I am trying to extend the ends of each line I have in a seismic survey 2 miles. I have tried using the extend line (Editor) tool but it needs an intersecting line to move to. Does anyone know how to ...

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