0
votes
1answer
28 views

Polygon area calculation in Ruby (on Rails, rgeo, PostGIS and GEOS) in sqare meters

In a Ruby-on-Rails application, I need the area in square meters (or any other surface measure, be it ares, hectares, square kilometers, but not in pseudo surface measure like square degrees) of a ...
0
votes
0answers
19 views

QGIS Spatialite Views problems

I am trying to wrap my head around spatialite views in QGIS. However there are severe limitations that make it very cumbersome: Spatialite views in QGIS do no update, if the corresponding tables in ...
1
vote
0answers
15 views

Merge all features in polygon shapefile with gdal

How do I apply using this same concept, but simply merging all features into one? ogr2ogr output.shp input.shp -dialect sqlite -sql "SELECT ST_Union(geometry), dissolve_field FROM input GROUP BY ...
1
vote
1answer
22 views

How can I create polygons for a 3D map from a DEM in grass/qgis

I have a SRTM 30m DEM of my area. I want to create a physical 3D terrain map from it (from felt, 3D printer, you name it). I have two questions about this process: With grass r.contour I created ...
1
vote
0answers
13 views

Updating basemap and layers at same time using ArcGIS Runtime SDK for .NET?

i'm working with ArcGIS Runtime SDK for .NET 10.2.5, my app has different graphiclayers with objects that are continuously moving around the map (new position data is provided fastly), the problem ...
1
vote
0answers
14 views

How to export from WINSTAR to ArcGIS [on hold]

I have data in a very old "winstar" type of format. However, currently I only use ArcGIS for Desktop and QGIS. Does anyone have an idea on how I can import this old-fashioned winstar stuff to ArcGIS ...
0
votes
0answers
10 views

How to create custom tile cache

I have published my Postgis table as wms service with Geoserver. And I want to create my custom tile via wms. For example my map SRID is 4326 and uses OpenLayers. When I add my wms layer on map, wms ...
1
vote
0answers
8 views

Leaflet inbuild AJAX methods for WMTS getCapabilities request

I was wondering whether the Leaflet library has inbuilt methods to make AJAX requests. My goal is to create a plugin that makes an XMLHttpRequest request to a specified WMTS resource and parse the XML ...
1
vote
2answers
59 views

Limiting digits in ArcMap?

I am using ArcMap 10.2. I want to create a land information system, one of the features attribute data includes a citizen id field, it includes 11 digits, for preventing wrong value entering, i want ...
1
vote
1answer
36 views

Setting PDF page numbers/names when created by Export Map enabled with Data Driven Pages?

how to create PDF with Grid Number in Data Driven Pages i tried to export PDF but it is export with page no like 1,2,3..... but i want to export with Grid Number is there any way to export like that ...
-1
votes
0answers
14 views

Projection and transformation [on hold]

How do I project GCS_WGS_1984 to Nepal_Nagarkot_TM? In the process of transformation if gives invalid transformation. What can be the solution?
1
vote
0answers
3 views

Include <link> in GPX when writing from ogr2ogr

http://www.gdal.org/drv_gpx.html seems to indicate that ogr2ogr should be able to write <link>[1] elements into a GPX file, however when using ogr2ogr to convert from PostGIS to GPX, I get the ...
0
votes
1answer
23 views

Map Not rendered Leaflet but renders correctly in changing the zoom level of browser

I am loading a leaflet map rendering mapbox tiles, geojson layers (initially i dont show the map) and i also have tabular links which can be seen when the page loads, the links are list of places and ...
1
vote
0answers
12 views

Extracting Elevation-Volume Data of storage areas out of range

I was extracting elevation-volume data of storage areas using the HEC-GeoRAS extension of the arcmap. But it wasn't able to extract the elevation data and it appears "5, Index was out of range. Must ...
1
vote
0answers
18 views

How to correctly input complex multiband functions in Raster Calculator?

I'm trying to compute a MTVI2 (Modified Triangular Vegetation Index - Improved) and EVI (Enhanced Vegetation Index) from Landsat 8 imagery. My formulas are as follow (I'm using ModelBuilder): MTVI2= ...
1
vote
1answer
29 views

How can I change region style in MapBasic

I've problem with my code in MapBasic for change region style in MapBasic. I've created voronoi and I want to select that voronoi and change the style of it to yellow border and no fill. I already ...
2
votes
1answer
30 views

How can I copy non-blank values to a new column from different columns in the same layer in QGIS?

My data: n1 n2 n3 NEW_COLUMN 11 null null null 33 null null null 55 My desired result: n1 n2 n3 NEW_COLUMN 11 null null 11 null 33 null 33 null null 55 ...
1
vote
1answer
46 views

St_Difference between raster and vector using PostGIS

I want to calculate the difference between a raster and vector layer, I used this querie but it's so slow and I don't know if it's right or not. I'm not using st_difference because it only support ...
2
votes
1answer
28 views

Rotation of polygon fill symbol using ArcGIS for Desktop?

In ArcMap (ArcGis 10.1) I'm trying to find a way to fill a polygon with a symbol in different orientations. Is it possible? Example: look at the red semicircles, I would like to do something like ...
0
votes
0answers
13 views

How to use NewSQL Database with GPS tool with Node.JS as server side programming

I am a web project manager and I want to create a website to show current position of cars on the map (google or ARC). I know how to create the website, but I don't know how to fetch the longitudes ...
2
votes
0answers
9 views

Remote sensing Classification and texture analysis compared with QGIS zonal statistics

Some back round: Using Geomatica to analyse suburban spectral signature in Las Vegas. Ran a texture analysis on all band images. Combined texture bands with original image bands to run an unsupervised ...
1
vote
0answers
14 views

Toggle layers on print composition

I want to use QGIS to make several views of bold colors for one same map. I've been using the layers in order to keep one on top of another. How could i make a composition on the print composition ...
1
vote
0answers
14 views

Change detection between two Landsat scenes? [duplicate]

I want to do time series analysis and find change in NDVI. I have rasters where each pixel is represented by some value at a time. Also I have same thing but represented by points. And I would like ...
0
votes
0answers
6 views

How to set the ALLOWED_HOSTS setting in GitHub-installed GeoNode?

I installed and developed a project in GeoNode in parallel to another CMS project in Django. The CMS runs in localhost:8040 and GeoNode runs in localhost:8000. It is important to know that GeoNode was ...
1
vote
0answers
14 views

Raster images overlaying each other but shouldn't

When I open a new map document and drag different raster images into the map the images stack on one another rather than form the complete image of a country. When I try zooming in, the multiple ...
-4
votes
0answers
40 views

When creating any map, what four basic elements should you include? [on hold]

for a homework asigment and i just cant find the answer!!!
2
votes
1answer
35 views

How do I make a hexgrid in QGIS with cell identification numbers

I'm getting started with QGIS as part of my interest in military science and wargaming. I'm running into a problem adding identifiers (column and row) to the hexcells that I've created with mmqgis. ...
1
vote
1answer
20 views

Search radius for some intermediate distance

ArcMap on my laptop runs very slowly. So it can take a long time for a near table to run. Is it possible to use a search radius for some intermediate distance? For example, the search radius only ...
1
vote
1answer
31 views

Update Cursor with Date Issue [on hold]

My dates (maxDate, minDate, avgDate) all print out with the correct datetime format, but I am unsure if the problem is how the loop is written to update the cursor. Error: line 102, in updateRow ...
1
vote
1answer
24 views

Joining table to a near table

I calculated the distances between one set of xy coordinates and another set of xy coordinates. So my near table has the ID variables, distance and rank. However, when I join the near table to the ...
0
votes
1answer
22 views

Arcgis javascript - Set different symbol for each graphic in feature layer

I have a feature layer that contains 12 items with the same defined style. But I want to change each item to have a unique symbol when rendered. var Layer = new FeatureLayer("http://...my map ...
1
vote
0answers
15 views

What tools are avialble to help keep DEV, UAT, and PROD environments in sync?

Recently, I was doing some development work against our DEV environment. It seems logical at the time. When nearly complete, and after much face palming, I found the DEV environment was way out of ...
0
votes
0answers
11 views

Which Address Locator Style to use for UK addresses?

I'm trying to make a locator to geocode UK addresses, but it seems that there's no address locator style that will geocode according to street addresses for non-US countries, what should I do?
0
votes
1answer
22 views

Multiple Cached Tiles consumption

I have created two caches for a project and there are coexisting within the same folder. Right behind I open ArcMap, add my File System Raster Layers and Share as Service. My *.mxd document has ...
1
vote
1answer
28 views

Using proj to convert EPSG:2263 to WGS84

I have input data in EPSG:2263 with X and Y coordinates such as: X,Y 987043,206407 982441,212359 990907,209020 (these locations are within NYC). I need to convert these to WGS84. Using QGIS if I ...
1
vote
1answer
24 views

Using WK ID's when using CreateSpatialReference tool

I recently found out how to create specific spatial reference objects and add them to my arcgis python standalone script. ...
0
votes
0answers
9 views

Open Popup on CartoDB Layer

I have a cartodb viz layer (polygons) and geojson layer in a leaflet map (parcels), where the geojson layer overlaps the cartodb layer. How do I disable the interaction to the geojson polygon layer so ...
0
votes
0answers
19 views

ArcMap hangs on “Initializing Application…” when starting from Visual Studio?

This has worked just fine for years; I don't know what changed. ArcMap 10.0 starts just fine on its own, it's just when using the debugger to test my add-in that it won't start. The add-in, once ...
0
votes
1answer
37 views

How do you delete a feature class if ArcCatalog locks the geodatabase?

I'm trying to delete a feature class from a personal geodatabase using ArcCatalog but the file is locked because it's opened exclusively by me. The process fails to get a schema lock. Well of course ...
1
vote
1answer
14 views

Geoserver SLD line ends labeling

I am having a hard time putting labels on both ends of a line Here is SLD that I have so far. It puts a label on one side only but I need it on both ends of a line. <?xml version="1.0" ...
3
votes
1answer
76 views

Match features that are spatially similar with ArcGIS?

I'm hoping there might be a way to match features from one feature class to features of another feature class that are the most spatially similar. I have two datasets representing the same thing but ...
0
votes
0answers
15 views

Using the Make Query Table for Querying a Many-to-Many relationship

I have two tables that I have connected via an attributed relationship class of the cardinality Many-to-Many. One is a table of water body (rivers) features and the other is a series of pollutants ...
1
vote
0answers
25 views

What is the fastest way to select oldest, unique geometry from a table containing duplicates in PostGIS?

I have an output from an ArcPy arcpy.Union_analysis operation and for the overlap polygons that were created I need to select out the oldest feature (along with the attributes). The result is 75740 ...
0
votes
1answer
15 views

How do I get a non-circle marker in a category map on CartoDB?

I have a CartoDB map which has two layers. I want both to display, and I want both to be category maps — there are 3 categories in each which display as three different colors. But I want to ...
1
vote
2answers
22 views

Overlaying a (say) 1Km x 1Km to a CartoDB or Here map

Is there a simple way to add a (say) 1Km x 1Km grid layer (or overlay) to a cartoDB map or Here map so that as when zooms in or out the grid lines remain accurate. (NB. An absolute ...
0
votes
0answers
15 views

QGIS 2.4 Problems with TauDEM

I am trying to run TauDEM algorithims with zero luck. I am running QGIS 2.4, have installed TauDEM 5.0.6, MPICH2 and still am getting nowhere. I either get a problem loading output layers or directory ...
0
votes
1answer
23 views

Using Mapbox (LeafletJS), how do I edit imported shapes from GeoJSON?

Overview: I'm currently working on a project where I'm importing GeoJSON into a map using Mapbox. However, I'm wanting to be able to edit those shapes once imported into the map. I've gotten the ...
0
votes
1answer
24 views

Converting mapsforge .map file to OSM or shp

I have found solution for converting OSM file into .map file but is there a way for converting .map file back to osm or shp or any other well-known vector file type? by .map file i mean mapsforge ...
0
votes
0answers
8 views

Error in osm.xml while generating the output xml for tile server using generate_xml.py

I'm setting up my own tile server using PostGreSQL, PostGIS extension, mapnik and osm2pgsql. While trying to generate the xml by using the command: E:\>python generate_xml.py download_osm.xml ...
1
vote
1answer
35 views

Graph/Network building and analysis of linked polygons in ArcGIS 10.2

This is more of a follow-up question to Divide polygons into *n* number of groups of equal counts with ArcGIS 10.2 and grouping village points based on distance and population size, particularly the ...

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