1
vote
1answer
5 views

Manual (or examples) of r.ros, r.spreadpath and r.spread in GRASS

you can report me references or applications for use of the following modules (GRASS): - r.ros, - r.spreadpath, - r.spread. Thanks so much.
0
votes
0answers
3 views

Does ArcGIS Pro join to excel worksheets like ArcMap does?

I love the idea of ArcGIS Pro, especially for non-GIS analysts to get one-off maps done easily and quickly. The big question is: Does ArcGIS Pro join to excel worksheets like ArcMap does?
0
votes
1answer
27 views

How to query all layers in ArcMap and get access to them by name or index?

I have next issue: I have ArcMap with tons of layers. Some of these layers may contain another layers with data (aka Composite layers) or they don't. The depth of composite layers in unknown. I need ...
0
votes
2answers
5 views

Finding a point inside a polygon based on maximum value of a specific field

I have a Polygon Shapefile that represents US counties and a Point Shapefile that represents hospitals. The hospital attributes table includes fields like "Number of Beds", "Number of Patients" and ...
1
vote
1answer
10 views

Field Calcuator to add percent using Python

What might I go wrong here is that I am trying to add percent. I use the Field Calcualtor and it keeps getting an error. I am using the Table to add the field named Percent and then type this.. ...
0
votes
2answers
34 views

NDVI derived from Landsat band 3 and band 4 using QGIS raster calculator shows the different range when opening in the ArcGIS

I have calculated Normalized difference vegetation indices from landsat 5 band 3 and band 4 that have 0-0.38 minimum and maximum ranges respectively. But whenever I open the same NDVI.tiff file in ...
1
vote
1answer
128 views

Select polygons by attribute belonging to another layer

I'm a recent QGIS user. I have a shapefile A with a series of polygons indicating land use of an urban region (urbanised areas). Now I want to select them in relation to a second shapefile B with the ...
0
votes
1answer
9 views

How to Make an Outside Buffer in QGIS?

I have a layer of street segments that are within a given distance of a fire station. Now I want to make a border around these street segments. If I use Buffer, it puts a buffer around each segment. ...
1
vote
1answer
12 views

Gdalwarp with “out of globe” values in sinusoidal projection

I want to project a global image (source ERA INTERIM) from WGS 84 to sinusoidal, using gdal 1.11 and bilinear resampling. It work fine BUT I have values everywhere on the rectangular extent of the ...
-1
votes
0answers
7 views

Discover multipart features in a layer in QGIS [on hold]

As the title says, thank you in advance! Edit : The version is 1.8.0 and what I tried is : 1) look at the attributes table, 2) select a random feature and check in the canvas if there are multiple ...
0
votes
0answers
5 views

Animation in CartoDB

How do I prevent my animated in CartoDB map from starting over (looping)? I would like it to animate and end on the latest date. thanks, Frank
2
votes
2answers
106 views

How can you alter label styles (font, color, size, etc.) using Python scripting? (ArcGIS 10.2)

I am trying to write a python macro that will automate the process of labeling points in a layer based on different types of apartments. For example, one style of apartments would have a blue square ...
0
votes
2answers
16 views

Edit multiple vertices of different features simultaneously

I am using ArcGIS 10.2.2 and would like to edit multiple vertices of different features simultaneously. For example, I have a man hole with three laterals - is it possible to select all four features ...
2
votes
1answer
11 views

Curvature computation for different scales

I would like to assess terrain curvature, i.e. the 2nd derivative of a DEM, on different scales. The most common approach to curvature seems to be the one suggested by Zevenberg (1987) where a ...
0
votes
1answer
20 views

Export selected fields in ArcGIS to Excel using Python

I'm am creating a script that will allow a user to add XY coordinates to a point layer, then export (along with any addition user selected fields) to Excel. I am getting stuck on the iteration of the ...
2
votes
3answers
73 views

Change symbol size in legend for FeatureLayer (ArcGIS API for JavaScript)

I'm learning how to create web applications using the ArcGIS API for JavaScript. I have a map that is displaying both an ArcGISDynamicMapServiceLayer (which includes two layers) and a FeatureLayer. I ...
1
vote
1answer
222 views

How to set min and max value for stretchType: esriRasterStretch_PercentMinimumMaximum

How can I set the min and max values for the stretch type "Percent Clip" in arcobjects? It's possible to set the Stretch type: rasterStretch.StretchType = ...
0
votes
0answers
5 views

Restart plugin from PyQGIS

I'm writing a plugin for QGIS and inside the method def run(self), after the OK button of the plugin is clicked, i.e., inside # Run the dialog event loop result = self.dlg.exec_() # See if OK was ...
3
votes
1answer
28 views

Need advice for localized survey base point

I have a set of 4 control points used for H and V localization. There is a base point located far to the SW of the property. I did not create this myself, but took it off of an existing Pocket 3-D ...
1
vote
0answers
5 views

Photogrametry using e-Foto (Stereo Plotter, Stereo Imagery)

I'm learning Photogrametry with Stereo-view using e-Foto (http://www.efoto.eng.uerj.br/en). At the end, I want to know how to do Photogrametry via Stereogrametry. I could replicate successfully ...
0
votes
0answers
3 views

customize the silverlight esri feature data grid form template?

I would like to add drop down box and multi-column text box to the feature data form which pops up when i click on the feature data grid. Instead of the regular text box i would like to replace some ...
0
votes
0answers
7 views

IdentifyTask for “hollow” polygon (using ArcGIS API for JavaScript)

I have a web map application set up that's currently testing on a variety of Dynamic Map Service layer types, including points, lines, and polygons. This application includes a tool that makes use of ...
1
vote
1answer
94 views

Plotting Multiple Points on Google Map using VB.net

I am creating a database application using VB.net and MSSQL 2012. I have retrieved a list of customer from the database and want to plot them on google map. At it stands, I can only plot the first ...
2
votes
4answers
44 views

How do you generate WKT from a graphic drawn on a map?

All, In order to do some quick analysis using SQL spatial, I'd like to generate spatial objects using the STGeomFromText / ST_GeomFromText function. With point data, I can do this by geocoding an ...
0
votes
0answers
5 views

OpenLayers: showing polygon within donut hole

I Am using OpenLayers 2.13.1 to display Zip-areas. I have a postGIS database with multi-polygons, that I show on a map. The user can select / deselected them. Some polygons have an area (I think they ...
0
votes
0answers
4 views

OPenLayers z-Indexing Issue

I'm having a hard time figuring out how to order the stacking of 2 layers - here's a fiddle, where I try to put the polygon in the front to the back: http://jsfiddle.net/HD9yJ/6/ I've read several ...
2
votes
1answer
17 views

Double transformation of marker in Carto CSS

I need to show on the map the direction of the road traffic with arrows. For this purpose I use markers for Carto CSS in TileMill. If the road has in OSM tag oneway="yes" or oneway="1", all is ok, ...
2
votes
1answer
84 views

Getting Uncompressed Size of Raster using ArcObjects?

How can we get the Uncompressed Size of a raster as shown in the layer properties below using ArcObjects?
0
votes
1answer
35 views

Copying XY to clipboard using Python Add-In (ArcMap)

I am trying to create a simple tool to copy XY from where i click the mouse button. What i have done already is: create add-in files using Python Add-In Wizard create toolbar and tool inside it in ...
1
vote
2answers
26 views

How to use an IF THEN statement in an sql Select expression?

I need to select the top 3 records from a table, but depending on an inline variable from an iteration, occasionally one of those top 3 records should not be selected and should be replaced by the top ...
0
votes
0answers
5 views

OpenLayers: programmatically fire ModifyFeature event

Does anyone know how to programmatically simulate a vector feature click that puts this feature from normal mode: to modifyfeature mode: I only have one feature inside the vectors layers and i ...
0
votes
0answers
6 views

QGIS 2.4.0 doesn't support multiple types of geometry in GML file

I'm testing GML 3.2.1 data according to INSPIRE Data specification (version 3.0). Data for theme Cadastral Parcels shall have both polygon geometry and definition point. When I download data from my ...
3
votes
1answer
447 views

Cannot see OpenLayers under Plugin in QGIS 2.4

Although I have installed the OpenLayers plugin, I cannot see it in the list when I click on Plugins. Does anyone else have this issue?
23
votes
7answers
1k views

What tools for regionalization/redistricting can you recommend?

I am looking for tools for regionalization / districting in GIS. So far I have been able to identify Districting ArcGIS extension (now also online) REDCAP (currently limited to 50k input polygons) ...
4
votes
2answers
125 views

What are good colour schemes for large density flow maps?

I came across nice QGIS tutorial for mapping flows. In contrast to Alasdair, I have zero talent in colour choice. Can anybody recommend some good starting points for nice colour schemes (I'd be ...
1
vote
1answer
566 views

Import SketchUp created KML contour lines model to QGIS

There's a neat trick to create contour lines based on the GE 3D terrain using Sketch-Up. The resulting KML however is a model I have looked at ways of importing KML layers to QGIS, like it was ...
-1
votes
0answers
12 views

RMSE better for Landsat or ikons [on hold]

Landsat satellite image having 3 RMSE would be conSider better than RMSE value 2 for IKONOS satellite image rectification ?
1
vote
1answer
21 views

QGIS - Identify overlapping polygons in single layer

I have a shapefile of buffered points in QGIS. I need to display all buffer polygons in this layer which overlap. I have experimented with the intersect tool, but this only seems to work if I am ...
3
votes
0answers
21 views

How to set Vertical Coordinate system when creating a 3D shapefile?

I'm working with GDAL v1.11 and am seeing the vertical CS stripped when exporting a 3D shapefile (from oracle spatial). This is the command I'm running: ogr2ogr -f "ESRI Shapefile" B_POINT.shp ...
3
votes
1answer
89 views

Openlayers popup not closing

This is a special case, I have many popups attached to objects and they work fine and I am having a problem in only one case. All layers and popups are handled by select control's onFeatureSelect, ...
2
votes
0answers
9 views

Extract areas of multi-part polygons (SpatialPolygonsDataframe) R

I have a SpatialPolygonsDataframe with multiple polygons, some of these have multiple parts (blue shapes below). In GIS-land it would be easy to get the areas of the individual parts of a multi-part ...
1
vote
1answer
35 views

How do I get the legend from a ArcGISDynamicMapServiceLayer using esri javascript api?

New Code: I updated the code a bit to more a recent recent version of the api, but ashima was correct in that I was not passing my layer as an array. Fixed that and it worked map = new Map("map", { ...
0
votes
0answers
8 views

How to join the shape to an external data

I'm developing an application that uses Shapes only to draw the map. I would like to "Inject" the data at the time of viewing, since my data is dynamically changing. Anyone know of any way of doing ...
2
votes
1answer
38 views

Trying to preserve attributes using SearchCursor

I am writing a python script for ArcGIS. I'm fairly new to this so I hope I'm not missing something very obvious. I am having trouble preserving the attributes of a polyline feature class when ...
1
vote
1answer
18 views

QGIS 2.4.0-Chugiak: How to produce raster colour map

By carefully deriving the NDVI values from Landsat Band 3 and Band 4 after doing atmospheric correction by applying DOS1 method in semi-automatic classification Plugin QGIS, I was to calculate the ...
0
votes
0answers
4 views

Show information I have in a php array in a CartoDB map

I have an array of names of countries that rapresents the best countries for the user of my web application. Now I want to show on my map of countries all the countries in the array in different ...
0
votes
0answers
2 views

PostGIS 1.5 libstdc++ error

After some package updates on my Debian machine all my database queries involving postgis functions or types are returning: Error message from server: ERROR: could not load library ...
0
votes
1answer
83 views

fatal error LNK1104 qgis build

I try to build qgis1.8.0 using Microsoft Visual c++ 2010 in a Windows 7 64bit. all the dependency are installed and the solution qgis1.8.0.sln was generated succesfully. but my problem is the ...
0
votes
1answer
42 views

Add Google Maps Layer to OpenLayers Page

<script src="openlayers.js"></script> <script src="http://maps.google.com/maps/api/js?v=3&amp;sensor=false"></script> <script type="text/javascript"> .... ...
0
votes
2answers
1k views

How to Calculate fields for attribute table using Model Builder

I am working with the Model Builder tool in ArcMap. I have created a simple model that takes the Strip Map Index Features as an input. I have added fields to the model to produce more fields in the ...

15 30 50 per page