All Questions

0
votes
0answers
10 views

How to build a map that highlights only one state?

I'm a journalist working on maps of several Alaska databases. I'm learning as I go and have a question that's probably very basic, but very important for my projects: Using CartoDB, how can I create ...
0
votes
0answers
8 views

Get value of clicked raster cell

When I open a raster file in QGIS (for example a GeoTiff file), I want to quickly check the value of a clicked raster cell. I found there's an 'identify' tool in the toolbar, but when I click with ...
0
votes
0answers
3 views

Query tool option missing in publishing maps with geoexplorer

I want visitors to a website with a published map created by Opengeo Geoexplorer to query the layer (layers, if possible) it contained. I am able to use the query tool while composing my map within ...
0
votes
0answers
7 views

Create css Flex Module Edition

I would like to change the style of the component Flex Edition . The functionality is what I need but I find too much space it occupies such module for which I would like to make changes to style ...
1
vote
0answers
3 views

What controls the direction of TopoGeometry Linestrings?

In PostGIS, what if anything controls the direction that topogeometry LINESTRINGs will have when converted to geometry? It doesn't appear to be the order in which the edges are listed in the call to ...
0
votes
0answers
4 views

Smooth and boundary clean raster (GRACE) Data

I have some GRACE data that I would like to smooth out and generalize/aggregate the boundaries to look like the maps shown at this website. I've tried playing with filters, converting to integers ...
0
votes
0answers
3 views

How can I install the LARCH-EcoPlanIt toolbar in ArcMap?

In my study I´m looking for ecological corridors and I would like to use the LARCH model for it. I have downloaded it from this side ...
0
votes
0answers
20 views

Mapping API's which one to use [duplicate]

I am currently doing a project where I want to use some form of mapping API (Google maps or an open source alternative) that can show the location of simulated wind turbines across Ireland. I am ...
1
vote
0answers
16 views

Web mapping API popularity

Are there any online statistics for the popularity/usage of web mapping APIs? A diagram would be sufficient, if it can be published in a paper. I have only found one source: ...
1
vote
0answers
19 views

What does it mean when I get rows executed, but with no resulted table?

While applying the following tutorial: http://anitagraser.com/2011/02/09/creating-catchment-areas-with-pgrouting-and-qgis/ utilizing vector network which has been tested (and demonstrated ...
2
votes
0answers
35 views

How do I get rid of this thin band between raster layers created from TNM?

After hitting my head against the table for many days, I'm humbly presenting myself to the QGIS community. I downloaded 4 IMG files (1/3 arc second, elevation data) from The National Map on the USGS ...
2
votes
0answers
13 views

Why pgRouting GUI panel may not work in QGIS?

What could be the reason behind the mal-functionality of the pgRouting Layer GUI panel? In order to route shortest path via dijkstra function code I'm able to conduct the task using the following ...
0
votes
1answer
32 views

Using Field Calculator to fill out a list of unit numbers

I am adding address points for individual units in trailer/RV parks and I would like to be able to use the Field Calculator to assign the unit numbers. Is it possible to tell the Field Calculator a ...
1
vote
0answers
15 views

Geoserver WMS, WFS and Rest difference

I am new at geoserver. I connected to databse from admin panel and published layers. But I could not understand difference of WMS, WFS and Rest service. What is the difference?
1
vote
5answers
211 views

Make a polygon out of a polygon's hole?

I have a large polygon with many vertices that has a hole in its center. I want a polygon of the hole, the empty space. How can I easily do that? (It is much too complicated to digitize easily)
0
votes
1answer
12 views

Installing libspatialindex on Windows 8

I need to use Rtrees to make some code I'm running faster. However, in order to use Rtree, I need to install libspatialindex. When I've installed packages in the past I've been able to either download ...
0
votes
0answers
20 views

Python script suddenly freezes and start to consume memory

I have a Python 2.7 script that generates multiple polygons around certain polygon (see picture). The meaning is determinate the effectivity of windbreaks. I don't know if my solution for this problem ...
2
votes
0answers
7 views

Loop through a marker cluster using Leafletjs

I have a variable like this var cubbon = new L.MarkerClusterGroup() then i added many markers to this variable. now i like to create a function() and loop through the variable and find out a marker ...
3
votes
0answers
26 views

SetNull in Python script for Arcgis assign 0 value

I am writing a script in Python where I assign to few Tiff defined in a function as inputRaster a NoData value as follows: whereClauseSetNull = "VALUE > 100" outSetNull = SetNull(inputRaster, ...
0
votes
0answers
22 views

PyQGIS setSubsetOfFields function in QGIS 2.4

I found the function setSubsetOfFields to filter fields in a layer in the PyGIS cookbook: ...
0
votes
0answers
4 views

How to execute query based on previous query result and a field filter in arcgis flex api?

I'm trying to execute recursive queries and each one depend on the previous result. I'm looking for a method to use a filter field in the query execution based on the previous query result. Is this ...
1
vote
0answers
9 views

GRASS scripting for producing multi-band raster

I am trying to loop the r.sun function within a Python script. Anyway, I seem not to understand how I can stack the raster maps each loop would produce into a single multi-band raster (preferably in ...
1
vote
0answers
30 views

QGIS Problem in calculating the distance of points from line

I need to calculate the distance of villages ( villages as points) from a border. I have a shapefile containing the locations of villages and another one containing the border. On QGIS, I ran the ...
1
vote
0answers
22 views

Apply graduated symbology renderer works in Python console but not in standalone script

I use the following PyQGIS script to load a vector layer from a shapefile and apply graduated symbology to it (tried to make it as minimalistic as possible). This works well in the QGIS 2.4 Chugiak ...
1
vote
0answers
11 views

Change Data Source of Raster Layer Added to Map Display? Unexpected default

I have a script that I'm using to generate raster maps and automatically add them to the map display, but when they are added they are sourced to a temporary location. I use the same code for ...
0
votes
0answers
3 views

GeoServer SLD PropertyIsEqualTo problem

I'm having a, frankly, super annoying problem with SLD and the ogc:PropertyIsEqualTo/ogc:PropertyIsEqualTo filters. I have 3 different GeoServer instances on 3 different machines. All instances are ...
1
vote
1answer
7 views

how use height tag data in Project-OSRM

I am using Project-OSRM in my project . All is works . But I need use elevation data. Downloaded osmosis master . And SRTM plugin added to osmosis. Also this worked fine . SRTM plugin started and I ...
1
vote
0answers
10 views

how to open second window in my plugin for QGIS?

I create a Mainwindow for my plugin, but if I want to open a second window from this Mainwindow, with click on push button. How can I do? I tried the following function in my Main Class: dialog = ...
-1
votes
1answer
45 views

How can I convert NULL values to 0? [on hold]

I have to convert the NULL values of a database in 0 (number). What can I do?
1
vote
0answers
15 views

My map looks wierd and “pixly” in OL3

I'm trying to present a mapserver with OL3, it doesnt work well. The documentation of the mapserver is non-existent and the GetCapabilities to the mapserver responds with a very short (not so good or ...
4
votes
1answer
73 views

Convert downloaded LiDAR info to DEM in GRASS

I have downloaded LiDAR information as a .asc file and a .tif file, and even though I have tried multiple methods to convert them to a dem I am having no luck. Grass GIS says there is an invalid ...
1
vote
0answers
7 views

Is it possible using JavaScript and cartodb.js to get the layer's total amount of visible data in a certain moment?

I am working with a torque layer and I would like to know for each moment the amount of data points shown in the visualization.
2
votes
1answer
11 views

Conversion of CSV file in MyGeoData Converter - XY columns not recognized

Recently I have tried to import various CSV files with XY coordinates to MyGeoData Converter. In some cases I got a message: Selected data does not have a spatial part! For example, this file ...
1
vote
0answers
13 views

IDW with QGIS from a vector points file within a mask

Given two inputs: A shapefile: points A raster: mask I want to interpolate the points within the extent of the raster except the NoData pixels that i want to use as a mask. NoData pixels are the ...
0
votes
0answers
3 views

grass gis i.atcorr input should be reflectance or radiance

my question is "what should be the input image in i.atcorr' for grass 6.4.4 version. i tried giving both reflectance(dn) and radiance as input but values are coming properly. i read some where, it ...
2
votes
2answers
22 views

ArcGIS 10.2 : How to prompt a “parameter window” during the execution of a script tool (or model)

I am pretty new to ArcGis and ArcPy, so I apologize if my question seems straightforward. However, I have been looking on the web for quite a while and didn't find any answer so far. I am using ArcGis ...
2
votes
1answer
32 views

Which EPSG for UTM with 8 digits in QGIS

I have a UTM datasets with 8 digits, so the first digits are 32 (for UTM Zone 32N), but which EPSG should I use to get the data at the right spot in QGIS in a 6 digits system. If I want to transfer ...
1
vote
0answers
13 views

pgrouting query

I saw on the pgrouting workshop the following way to calculate a route: http://workshop.pgrouting.org/chapters/advanced.html SELECT seq, id1 AS node, id2 AS edge, cost FROM pgr_dijkstra(' ...
1
vote
0answers
12 views

Convert CSPro .map to ArcGIS shape file?

I have census data that uses the widely-established CSPro software. It also comes with a Map viewer and the data files are .map and .mdf extensions. Does anyone know how to convert these into an ...
1
vote
2answers
32 views

getting to grips with raster data: Tutorial needed!

I always have trouble understanding the different characteristics of raster data formats - Bands, RGB, Alpha, Color tables, Classification, Stretching, single color setting etc. Can anyone offer me ...
0
votes
1answer
11 views

Change Feature Type Details in Geoserver

http://docs.geoserver.org/stable/en/user/webadmin/data/layers.html, Section "Feature Type Details (Vector)" lists a Layers Features including its Feature Type. How can I edit these?
1
vote
0answers
26 views

Fix shapefile with basemap in ArcGIS for Desktop? [duplicate]

How I can fix the shapefile with the basemap in ArcGIS 10.2? I have transform the basemap projection to GREECE GRID, the same with the shapefile...but they don't fix exactly... I try to attach a ...
0
votes
0answers
10 views

Trying to build website which shows different satellite images? [duplicate]

Basically i want to build website which shows different satellites images of cities and as i hover my mouse the lat/long should change. Sorry for such a basic question, as i am new to javascript, if ...
0
votes
1answer
5 views

Z-index in OpenLayers 3: layer ordering in OL3

Is there a method to cjange Z-indexes of layers in OpenLayers3 like it was in old version? map.setLayerIndex(markers, 99); //set the marker layer to an arbitrarily high layer index and I need to ...
1
vote
1answer
43 views

Calculating area of polygon inside region?

I am new to geographic information systems and i need to calculate the area of a a polygon ( a circle to be precise) that falls inside the boundaries of a region, say a state or a country. For ...
1
vote
0answers
17 views

ArcPad GPS Data Captured misaligned

Data captured using ArcPad 10 is not displaying properly. The .shp file created in arcpad is diplaying a NAD 83 Zone 17 projection. From what I've been reading, the datum for GPS is usually in WGS ...
0
votes
0answers
8 views

Masking clouds with Fmask

I have been trying to mask clouds with the quality control band with landsat 8 imagery. The problem I continue to run into is that the quality control bands mistake tops of buildings and concrete as ...
0
votes
1answer
29 views

Using AJAX to run PostGIS SQL statements and display results via GeoServer

I am learning Web GIS, and I can't find a good example that gives a big picture of a web interface of running spatial analysis using PostGIS. What I am looking for is a graphical/GIS version of ...
1
vote
0answers
20 views

Creating Triangulated Irregular Network (TIN) in QGIS?

I want to create a TIN and view it in 3D in qgis. The tin am creating using interpolation plugin is a raster TIN but i want the normal TIN(vector TIN).
0
votes
1answer
29 views

How to plot the US maps with selected locations (longitude and latitude of the locations are known)?

I've been struggling with the following R plotting of the US map and wonder if any of you have suggestions on how the plot should be done. Here is what I have tried: US <- map("state",fill=TRUE, ...

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