1
vote
1answer
6 views

Use Display Expression for KML Popup, SHP to KML ArcGIS

In Arcmap I've created a complex label expression in the Display expression for my layer. I'd like to have that expression displayed when I convert the layer to .kmz file for display in Google Earth. ...
0
votes
0answers
9 views

Clipping rasters in Qgis

I'm having some problems clipping rasters... I started clipping my raster using extents, but I saw that the clipped raster is different from the original raster. I created a virtual raster to use as ...
0
votes
0answers
4 views

How to draw WMS layer with Attribute-Based Dynamic SLD to HTML Canvas?

I'm working on an app using geoserver and openlayers 2.13.1. I have several wms layers and I need to export whatever in my openlayers map div as an image. After researching, I found this blog: ...
0
votes
0answers
9 views

How to calculate distance from point to polygon with a time frame?

Using near tool I knew that I can just calculate distance of each house to the nearest fire. However I only want to keep fires that happened in the past 7 years for each house. For Example, I have ...
0
votes
0answers
13 views

Routing and Validating trip mileage with open source software

I am looking for ways to validate mileage charged by our contractors. They are paid from a central location to a customer, and then from the customer to a drop off location. I use QGIS for a bunch ...
0
votes
1answer
16 views

Cannot load postgis layer from sql string in pyqgis

I'm trying to load a layer using the following code in qgis python console: sql = "(select the_geom, ID from mytable)" uri = QgsDataSourceURI() ...
0
votes
0answers
8 views

Create a named map in CartoDB

I'm trying to create a template map following this tutorial from the cartoDB's maps API. My template.json file { version: "0.0.1", name: "template_1", auth: { method: "open" }, ...
1
vote
1answer
62 views

How to extract elevation information from contour lines?

I'm working with OS windows 7 and using ArcGIS 10.2 and I have a point shape, which I must extract elevation for every point in it but the only useful data is a contour line shape. Not sure if it's ...
5
votes
1answer
19 views

Spatial+Temporal database request for 4D intersection

Here is the function I need to implement. My application deals with mobile objects with variable position and range (think of radar range). As I can't test each minute if n mobiles detect each other ...
0
votes
0answers
1 views

How can I extract variable information from an OpenLayers 3 object?

I have tried to make a simple map with OL 3's Geolocation module. I succeeded with a resource wasting method. There must be a simpler way to extract variable information from an OpenLayers 3 object. ...
0
votes
0answers
3 views

Geoserver + MongoDB: connection OK but layers list empty

I setted up Geoserver (ver. 2.5.2) with the MongoDB plugin (ver. 11.2 - http://repo.opengeo.org/org/geotools/gt-mongodb/11.2/). The connection between Geoserver and MongoDB is OK and when I create a ...
0
votes
1answer
18 views

Gdal: How to reproject from equirectangular to mercator?

I work with raster ETOPO1, made a crop of my area of interest. curl -L -C - ...
1
vote
1answer
39 views

Hardware requirements for a modern GIS workstation [duplicate]

I need an advice on what hardware configuration would be most efficient for a modern GIS professional. Should I go for out-of-the-box HP/DELL workstations or should I assemble different parts? Note: ...
1
vote
1answer
18 views

How can you create a depth raster from a DTM and a polygon in QGIS?

I have a DTM raster and a flood outline in polygon format - how do I create a depth raster for the flood outline (i.e. flood level minus DTM level)?
0
votes
0answers
8 views

Can I tie-in a data collection form with an online map service to crowdsource values for map features?

Apologies if this has been covered before. I've done some research but unfortunately my Google Fu has failed me. I want to be able to collect some simple numeric data from multiple people over the ...
0
votes
0answers
13 views

What does property FeatureTypeName do in Styled Layer Descriptor (SLD) specification?

I am studying the Styled Layer Descriptor (SLD) specification. I got a general grasp of how I can use it to style a map. However, I still have a couple of questions regarding some elements. A bit of ...
0
votes
0answers
11 views

How to reference a number variable in r.mapcalc within QGIS graphical modeler

I need to run the following formula in r.mapcalc: (xor(abs(A-B),abs(A-C))>120)*A I would like to however use a user defined number input variable instead of the 120. I already have this variable ...
1
vote
1answer
19 views

In QGIS, is it possible to save graduated styles to use on different columns?

I'm using QGIS to produce thematic maps of 9 quantities (given in 9 columns in the attribute table) which have values broadly within the same range and I would like to plot them using the same ...
1
vote
1answer
15 views

Preserve attribute table while using extract by mask in arcgis

On using the Extract by mask function on a raster with several columns (beyond value and count) in the attribute table, the resulting raster does not have all the columns (it only has value and ...
0
votes
1answer
20 views

how to calculate area verses each NDVI value?

I created an NDVI map, I want to calculate area of vegetation verses the respective NDVI value of the given map. Which tools are used for this process and what steps are required?
1
vote
1answer
17 views

hiding some “feature”s in GeoJSON file on map

I have geojson file including boundaries of most countries in world. When I clicked on a "feature" (aka country, or polygon) I want to hide it while keep showing the others. because I am planing to ...
0
votes
0answers
11 views

Geoserver Realm

I am trying a lot of days to create a GIS app with Geoext, openlayers and geoserver through Apache! Well I achieved that but I had created many users with different roles! When I am loading my app ...
3
votes
0answers
17 views

Temporary File GDB-based scratch workspace is not deleted after it is released

I have created a temporary File GDB-based scratch workspace as follows: var factoryType = Type.GetTypeFromProgID("esriDataSourcesGDB.FileGDBScratchWorkspaceFactory"); var factory = ...
0
votes
1answer
16 views

tables created with “create table …” in CartDB

I observed the following: when I create a table with "create table mytable ..." in the SQL tab of the UI, the table is created under the public schema. I can see these tables only using: SELECT * ...
0
votes
1answer
13 views

How to set max map scale for a layer?

How can I set the maximum scale for a layer? Sometimes the layer is not visible (it disappear), when the map scale is >= 1:250000. I'd like to set it on max 1:125000. This code does not work: ...
1
vote
1answer
11 views

How to zoom to a specific point?

How is it possible to make the map zoom to a specific point like an address that the user wants to find? Codebehind: private void btnSearch_Click(object sender, RoutedEventArgs e){ var queryTask ...
0
votes
2answers
21 views

kml does not overlay correctly in QGIS

In QGIS, when I insert a kml contour that was created in Google Earth, it appears misaligned in respect to all the other layers. Note in this image how the red contour is moved upwards with respect ...
0
votes
0answers
15 views

insert row into postgis query table in QGIS

I find I am using QGIS (2.4) more and more as a client for PostGIS database tables with geometry, but also for tables without geometry, partly because it's good just to use the one application and ...
0
votes
0answers
15 views

Is there an editing function in qgis cloud? [on hold]

does someone know if an editing function exists in qgis cloud? or maybe is planned?
2
votes
0answers
40 views

Double labels in QGIS

I want to create labels like a fraction using data from two columns. I have tried to use: "Field" || '\n' || '――' || '\n' || "Field2" but it doesn't look good. How can I do it using other method? ...
0
votes
1answer
17 views

Cluster numbering in openlayers

I am using openlayers 2 for making clustering on vector point data for which I am a beginner. I have installed geoserver locally via opengeo suite and using 'world_cities' dataset as an example. I ...
3
votes
1answer
72 views

Use identify tool on a specific coordinate

Just a simple question. I would like to use the identify tool for a specific coordinate to get the pixel value. Unfortunately its not possible to place the cursor that precisely. I used the got to xy ...
1
vote
0answers
8 views

Utility Network Analyst

I want to write C# code for utility network analyst (downstream trace task). My code is: IUtilityNetworkAnalysisExt m_utilNetExt = new UtilityNetworkAnalysisExtClass(); ITraceFlowSolverGEN tfs = ...
0
votes
2answers
27 views

ArcGIS 10.1 Find Identical specify a search order

I have a large polygon feature class which I know contains duplicate features. I have tried using the Find Identical tool, but is just runs for days without producing a result. I have several ...
0
votes
0answers
8 views

How to use Openweathermap's wms in ArcGIS Online?

I would like to add this wms service to ArcGIS online. http://wms.openweathermap.org/service Unlike in QGIS, when I added it to the web services, there is no way for me to choose which layer to add ...
1
vote
0answers
23 views

Creating Form in QGIS

I want to create a form for editing attributes in QGIS. I have a lot of question and hope somebody can suggest how they work or where I can read about the next elements of form: Classification List ...
0
votes
1answer
18 views

Using SLD with WMS

How does WMS interpret the SLD it receives? Does it parse the document and immediately draws the layers defined from top to bottom? Or does it rely on the 'layers' and 'style' parameters you can send ...
0
votes
0answers
13 views

ArcGIS API for Javascript: Time Aware KML Animation

I am using ArcGIS API for Javascript. I would like to know how to animate a KML file with time-aware ground overlays using the built-in time slider?
1
vote
0answers
13 views

How to create a svg item onto Map Canvas in QGIS API?

I'm working on a project with QGIS-2.4.0 API using C++. I need to load some svg files to the application for displaying as symbols. QGIS API has a class named QgsMapCanvasItem, which is an abstract ...
0
votes
1answer
11 views

GDAL Application crashes when loading GDAL drivers

I'm developing on QT an application that uses GDAL library (which I compiled using MinGW 4.8). When I use the application on my windows 8 laptop, it works fine, but when I tried using it on several ...
1
vote
1answer
21 views

finding the nearest point outside a series of geometries

I have db with a very large amount of geometries (circles), most of them overlapping. I'm trying to come up with a way to find the nearest point (from your current location) that is not within any of ...
0
votes
1answer
12 views

Creating dual lines with one line in geoserver

Im trying to figure if it is possible to create a two lines from one line say for instance a road. One to create the out lines as an underlaying color while another line creates a top color but a ...
0
votes
1answer
17 views

How to convert Geographic wgs-84 to lambert (LCC_wgs 84 projection for a vector file?

I have one shape file with Geographic wgs-84 projection but i need to calculate geometry for that I tried to convert it into UTM projection system. As my data is of whole country so I can't give one ...
0
votes
1answer
47 views

Find overlapping polylines in same layer in ArcMap?

How can I find overlapping polyline features in a layer in ArcMap without writing any code? I have a PolyLine feature class in a personal geodatabase. It contains some features that overlap another ...
1
vote
1answer
46 views

How to migrate data directory of opengeo geoserver?

How to migrate data directory of geoserver in opengeosuite 3.1 to stand alone geoserver version 2.5.1. Is it to copy data directory and restart the server only or any thing else..
1
vote
0answers
25 views

Cannot Register Database

I want to publish a database to ArcGIS Server. When I try and register the database, I get this error: Can anyone help me? I am using ArcGIS Server and Desktop 10.2 with Microsoft SQL Server 2008. ...
1
vote
1answer
33 views

Calculating Field B from Field A, except where Field B has existing value, using ArcGIS Desktop 9.3?

Im trying to calculate Field B from Field A except where Field B has existing value in ArcGIS Desktop 9.3. (I suspect its straight forward but I have 'searched' and havent cracked it yet) Any ...
1
vote
0answers
27 views

How to overlay a flat image onto google maps with two points of reference?

The Android API allows for images to be superimposed onto a map. To do so, the developer specifies a set of lat/long coordinates for an "anchor point" within the image, the width (or height) of the ...
1
vote
0answers
14 views

Easy Guide to ESA satellite data?

Can anybody provide user friendly guidance to ESA datasets? What is available? When will new stuff be available? I struggle to work out what might be interesting amongst the many websites and their ...
1
vote
1answer
44 views

Setting up QGIS Server at low cost for small user community?

I want to setup QGIS Server at a low cost for a small user community (mainly me). Parameters: Some data is private so something like qgis cloud not an option (not enough money for paid option). ...

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