1
vote
1answer
239 views

How to limit vertically the extent of an OpenLayers map?

When I pan north, the map goes out and I see the white background of my HTML. I want to pan vertically and the map to block when it reaches the top (or bottom, respectively). I have tried to put ...
0
votes
2answers
22 views

Creating a drop-down list for arcpy script tool

I have written the following script but I cannot manage to create the drop-down list for the variable "select" (select=arcpy.GetParameterAsText(3)). Any suggestions? # Script arguments inputRaster = ...
0
votes
1answer
4 views

QGIS cannot snap

I am using QGIS 2.8.1 in Linuxmint 17. When I set the snap option, the message box is like this which is different from the pictures I found on the Internet. After I setting this and reload QGIS, ...
1
vote
1answer
362 views

How to set field values as labels in QGIS2 Print Composer

I am mapping the distribution of 325 bird species, displaying circles in the grid cells each species occurs in. The data contains as many duplicates of the NAME as there are cells in which it occurs. ...
0
votes
0answers
6 views

How to create dissolved buffers using QGIS virtual layers?

To create dissolved buffers in PostGIS I use ST_Dump and ST_Union: SELECT row_number() over() AS gid, sbqry.* FROM ( SELECT (ST_Dump(ST_Union(ST_Buffer(input_layer.geom, 100))))....
3
votes
1answer
366 views

How do I modify the WebAppBuilder "LayerList' widget to use radio buttons instead of checkboxes?

I've downloaded the developer version of the Web app builder and installed in on my machine. I can open up the widget '\LayerList\LayerListView.js', and I have been exploring the source code. I would ...
-1
votes
1answer
11 views

Generate random floating value

I need to generate random floating numbers between 0 and 1 in the field of attribute table for ArcGIS 10.3 version.
0
votes
0answers
12 views

Processing drainage lines in ArcGIS Desktop? [on hold]

When i am doing drainage line processing in ArcGIS 9.3 the dialog box is continuously running by showing "updating results" even it is executed successfully, what should i do?
0
votes
1answer
173 views

How to use Orthoengine in PCI Geomatica to georeference Pleiades 1B TIFF to WGS 84

I am trying to use the orthoengine in PCI Geomatica 2015 to reference an image to WGS 84 (ESPG: 4326). Acquisition mode PX Spectral processing PA+XS (resolution is 70cm) I have the associated RPC ...
0
votes
1answer
258 views

How to convert list of stack images to time series files in R

I am using bfast package for time series analysis. But it requires the files to be read as time series. How to convert list of stacked images from 2000 to 2013 into a time series and given as input ...
3
votes
2answers
936 views

Using arcgis.rand() with variables from code block of Calculate Value tool?

Within a larger ArcGIS ModelBuilder model I am trying to populate a field in an attribute table with a random number, using Calculate Value. The overall distribution of random numbers needs to follow ...
2
votes
1answer
4k views

What does “You do not have necessary license to run tool” mean when ArcGIS extension installed and activated?

I just purchased ArcGIS for Home Use 10.2 and installed and activated the extensions with the codes I received from Esri. The ArcGIS Administrator says Yes for Installed and Authorized, and even has ...
11
votes
3answers
355 views

Looking for ready tools to display real-time positions online

we want to show that in a big city like Palermo, cycling can be the fastest tool (and at the same time the most ecological). We will give 4 smartphones to 4 users, and there will be 4 ways to move: ...
12
votes
5answers
5k views

Are there open-source alternatives to ArcGIS online that can be hosted on my own server?

I know this might be too broad topic. But I am looking for web-GIS portal similar to ArcGIS online that is self-installable (configurable) to be hosted in my private server. The main features should ...
1
vote
2answers
1k views

OpenLayers vector does not draw (or re-draw) on zoom level change or layerswitcher off/on

Here is the full code (i'll highlight the important parts after): jQuery(document).ready(function($) { // =============================================================================================...
0
votes
1answer
233 views

grass - add on problem

I can't install the addon in grass 6.4.3 to my linux mint. i've already installed the SVN and than it says: GRASS 6.4.3 (fabian_idrisi):~ > g.extension r.fuzzy Fetching from GRASS-Addons SVN (be ...
0
votes
1answer
5 views

Adding drop-down menu to leaflet map to update map/tiles to new location?

What I want to do is create an interactive choropleth map that has a dropdown menu of various countries so that the map updates when you click on that country. As an example, here's an interactive ...
2
votes
1answer
1k views

Can QGIS open a SDF file created by HEC RAS?

I used the "export GIS data" option in HEC RAS and got a SDF file. Is it possible to open it in QGIS?
0
votes
5answers
2k views

Fix Self Intersecting Polygons Manually [on hold]

I are looking to implement a method to fix self-intersecting polygons by editing the vertex order. We want to take the polygon rings and re-arrange/add in vertices to make a valid polygon. This is ...
1
vote
1answer
11 views

how to download World MODIS image from ESRI ImageServer?

I need to download the following dataset that is available online in ESRI website: https://sampleserver3.arcgisonline.com/ArcGIS/rest/services/World/MODIS/ImageServer. I can view the map in arcmap as ...
1
vote
0answers
9 views

QGIS doesn't update some snapping options from Python

I've just installed QGIS 2.14.3 (Essen) on a Windows 7 machine, so I've got the default configuration on everything. This means that under "Settings -> Options -> Digitizing", I've got "Default snap ...
1
vote
2answers
188 views

Openlayers - ModifyFeature - How to label vertices with a progressive number

I am quite new in openlayer and javascript. I have a control ModifyFeature on a path vector layer. I would like the vertices to be rendered with a stylemap label showing their progressive number (1,...
-1
votes
0answers
27 views

Finding downstream Irrigated area for upstream outlet?

I'm trying to determine a command area for a given irrigation project based on the amount of stream flow at the head work (upstream) of a command area. The stream flow at outlet point is computed ...
0
votes
1answer
5 views

zoom by dragging a box in gxp geoexplorer suite

please help me!! How to add zoom by dragging a box in gxp opengeo suite? I need to add the tool box zoom by dragging the mouse mm yes, but in gxp do not exist
2
votes
1answer
35 views

Strava Metro users, how to interpret BIKECNTN?

Glasgow city provides its Strava user's stats created 2013 (link below). The CSV file contains all the expected columns including, "AMCOMMUTEN" "PMCOMMETN" "BIKECNTN" and so on. However, when we look ...
1
vote
2answers
982 views

Using snap point when using measurecontrol in OpenLayers?

I have a problem about measurecontrol. I can use measurecontrol and I can show length to use measure control . But my problem is that I didn't use in snap because measurecontrol is a control, not a ...
0
votes
0answers
13 views

Seeking free river and catchment maps of UK?

For research purpose I would need a map of UK rivers and catchments as I would like to select the gauges of my interest. These maps should be in shapefile, raster or anything else format readable in ...
0
votes
0answers
8 views

Clipping and exporting raster from QGIS to Google Earth?

I have a 3 band raster from which I need to clip a portion, and then visualise it in google earth. The problem is that the file generated after clipping, shows OK in QGis, but looks completely black ...
0
votes
0answers
5 views

Mapbox Error: Style is not done loading

I'm trying to draw on a mapbox map, based on suncalc results and using geojson. First I tried to create 2 functions, one to each line I was trying to draw. But when I did that, it would only display ...
0
votes
0answers
9 views

QGIS crashes when printing

I have a 50 MB shapefile. I am trying to import it into Illustrator. When I try printing to an svg file from the Print Composer, QGIS crashes. I am using QGIS Essen 2.14.3. I have tried lots of ...
-1
votes
1answer
46 views

Calculating grid to ground correction angle manually

I've been running into problems at work with calculating a correction angle manually. The coworker that has been training me in ArcInfo 8 showed me a formula that I have yet to get to get to work - ...
1
vote
2answers
72 views

Searching for detailed shapefiles in Vietnam: Tam Ky and Quy Nhon cities

I'm currently interning with UN-Habitat Vietnam in Hanoi, and am helping them produce some basic maps for community development strategies in the coastal cities of Tam Ky and Quy Nhon. This is my ...
0
votes
0answers
4 views

osm2po pgrouting giving wrong result

I'm trying to calculate the shortest path between two locations using OSM data (inserted in a database using osm2po) and pgrouting. Here is the query I used : SELECT x1,y1 FROM pgr_dijkstra(' ...
0
votes
0answers
4 views

Google Fusion Tables - KML import failed, can't figure out why

I hope that you may be able to offer some advice on how to solve a problem I am currently facing about importing files into Google Fusion Tables for use with Google Earth Engine. I have looked at the ...
1
vote
2answers
181 views

Link to another table in CartoDB infowindow

I have two layers in CartoDB, one with spatial data, school_count, and one without, heisman_winners. I want to visualize my spatial layer but when a user clicks on a feature I want it to display data ...
0
votes
0answers
80 views

Linking service areas to original point data in ArcMap? [duplicate]

Using the Network Analyst tool in ArcMap 10.2, I want to link service area polygons to the original point data that inspired them. So I have data on the locations of several thousand retail sites and ...
4
votes
1answer
84 views

Land Use classification and canopy cover using LT8 imagery and ground truth points in QGIS

I am trying to run a land use classification with QGIS on LANDSAT8 imagery to classify the various land uses within an area of northern Vietnam. I want to distinguish between primary forest, ...
0
votes
1answer
34 views

ArcMap: export each x/y coordinates to a separate row

I am trying to sort out how the coordinates of each point in a multipoint or polyline feature could be exported to a .txt with python so the exported file looks like this: point1_coordinates_x ...
1
vote
1answer
18 views

arcpy export data view to jpeg: label size changes

I designed a little arcpy script to export different layers in a data view to jpeg (world files included). It's the first time I actually use arcpy but it works. The only drawback is that the labels ...
0
votes
0answers
10 views

Gstat krige() error: Covariance matrix singular at location [917300,3.6109e+06,0]: skipping

Recently, I am facing a strange problem when using krige() in gstat library. This error was not there a few months ago because I am using the same code with the same data that I successfully used ...
0
votes
2answers
30 views

openlayers-3 popup getfeatureinfo

I'm Working on a map and I want to put popups to show information about each queryable layer. This is what I've got so far, but I can't make it work. HTML: <section class="visualizador" id="...
0
votes
1answer
13 views

Convert WGS-1984-Pseudo Mercator to OSGB1936

I've imported UK wide coverage of ESC wind exposure data as a raster to ArcMap 10.2. The data is in WGS 1984 Pseudo Mercator which puts it way out against the UK OS standard grid. I can't get it to ...
6
votes
1answer
361 views

Using GRASS algorithms in Sextante under ArcGIS Desktop?

Sextante for ArcGIS comes with SAGA modules. I know that I can use GRASS algorithms in Sextante under gvSIG. But how can I use GRASS algorithms in Sextante under ArcGIS Desktop? I tried to look ...
0
votes
0answers
13 views

Geoserver CORS Header missing (Cloud) [duplicate]

I'm trying to access Geoserver's WMS GetCapabilities to populate a grid with the available layers and I receive this error : " CORS header 'Access-Control-Allow-Origin' missing " here's my code : ...
0
votes
1answer
17 views

How to find midpoint of 2 geographics locations?

I am trying to write a C++ program which finds the geographic center of two locations (defined by latitude and longitude, I can ignore the altitude). This center point shall be on the halfway of the ...
0
votes
0answers
21 views

How can I manually create shapes from overlapping shapes of other layers?

I have two shapefiles, one showing the borders of the US states, the other one showing river basins. Both layers are filled with solid colors, with the US states differing in hue and the river basins ...
3
votes
2answers
319 views

ArcGIS Javascript API: Adding a shapefile with more than 1000 points

I am able to add shapefiles with less than 1000 points by using the ArcGIS Portal REST API as shown in this example: https://developers.arcgis.com/javascript/jssamples/portal_addshapefile.html ...
2
votes
1answer
78 views

Setting threshold for unions in PostGIS?

I have a shape file of buffers. What I'm trying to do is to merge the buffers that intersect, but not just if any part of the buffers intersect. I would like to set a threshold, for let's say if 50% ...
0
votes
0answers
19 views

Change the Shortest Path graph to shapefile

Can I use the shortest path graph from the https://docs.qgis.org/2.6/en/docs/pyqgis_developer_cookbook/network_analysis.html example and make shapefile or a layer? Or is necessary to modify the ...
4
votes
3answers
6k views

Extracting one band from three band raster in ArcMap?

I'm fairly new to ArcGIS and I get into trouble extracting a single band layer from a raster image .img in ArcMap that I want to use after in zonal statistics. So far, all help I found is to do the ...

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