1
vote
2answers
5 views

Fusion table connexion issue

I'm trying to import some data from a SHP to GFT (Google Fusion Table). I get a 401 error. I'm using an Ubuntu 14.04 LTS Linux 64 bits with GDAL 1.11.0, released 2014/04/16. GFT is available (tested ...
-2
votes
0answers
19 views

How to calculate areas of NDVI with Qgis? [duplicate]

How do I calculate the area of the pixel values of NDVI with QGIS? Excuse me, I do not speak English. Ya calcule el NDVI de una imagen Landsat con Qgis, ahora Necesito obtener las Areas de cada ...
0
votes
0answers
34 views
+50

Adding KML layers to ArcGIS JS API v4 (beta)?

I have been building a web application using ArcGIS JS API v4.0.Beta1. I am having difficulties finding out how to add KML layers to the scene. How do I add the KMLs? I have tried adding a new feature ...
0
votes
2answers
35 views

QGIS 2.10.1 on Mac/ Multiple versions on Mac

I have Version 2.8.2 running fine on a recent iMac running Yosemitee. I have tried the install of 2.10.1 from http://www.kyngchaos.com/software/qgis but it doesn't work. I would like to be able to ...
1
vote
1answer
152 views

Error Reading ESRI ArcGrid File using GeoTools?

I have a raster file in ESRI ArcGrid format (e.g. hdr.adf). I would like to run some analysis using GeoTools. I've never used the coverage classes before and I'm having a few problems out of the ...
5
votes
3answers
16k views

How to draw a polyline in Leaflet?

This is my coding I used in Leaflet: var pointA = new L.LatLng(28.635308, 77.22496); var pointB = new L.LatLng(28.984461, 77.70641); var pointList = [pointA, pointB]; var ...
-2
votes
0answers
10 views

migrating from arcgis server to open source technologies --> what mapserver and tileserver should i use? [duplicate]

I am migrating from ArcGIS server backend to open source technologies. I have about 100 map services (~300 GB data) each with 100+ layers. I also have a web application where the user has to have a ...
1
vote
1answer
18 views

How estimate or get the value of PDOP from HDOP value?

I have a gps device that are reporting me the HDOP value and the number of satellites around, but I have as requirement to get the PDOP also, the GPS device doesn't give that value. Can I get PDOP ...
5
votes
1answer
668 views

What are the default units of elevation/altitude/z in GeoJSON?

The GeoJSON spec says "The default CRS is a geographic coordinate reference system, using the WGS84 datum, and with longitude and latitude units of decimal degrees". It doesn't say seem to specify ...
1
vote
2answers
202 views

Accuracy assessment in eCognition

How to do accuracy assessment of classified images in ecognition? I have done the image segmentation for Worldview-2 image. Then, I have processed for classification for class names (e.g ...
0
votes
0answers
11 views

How to get data for ArcPad witout forms in .apl file [on hold]

I am trying to get data for ArcPad without forms ( <FORMS>) in .apl file. Can I do it? My .apl file is: <xml version="1.0" encoding="UTF-8"?> <ArcPad> <LAYER ...
1
vote
0answers
17 views

Creating new empty vector layer that has same set of atributes as another layer and then copying subset of features into it?

I am new to both Python and QGIS. Here's a sample of my code: unique = layer.uniqueValues(index) attributes = layer..dataProvider().fields().toList() assistant_layer = QgsVectorLayer("Point", ...
1
vote
0answers
8 views

How to batch convert .rbin to .shp

I am trying to batch import or convert .rbin files to .shp files. Right now the only way I've found to do this is by using the software's Rbin viewer. This viewer will let me export one .rbin file to ...
0
votes
1answer
21 views

Is there any comprehensive book or online instruction on image segmentation techniques?

I'm looking for a source to learn theoretical basis of image segmentation techniques thoroughly. The desirable book, or other kinds of source you may know, should cover the techniques that are more ...
3
votes
1answer
1k views

Panning to specific feature using ArcPy?

I am attempting to use python and arcpy to automate the creation of some standardized maps I need to export for feature classes from various projects. I have a set of points and I need to export a ...
1
vote
1answer
153 views

How to create least-cost path between two polygons with GRASS?

I am completely a beginner in GRASS but I would like to use it to have the cumulative cost of moving between two polygons. More exactly, I would like to get the smallest cost from any point situated ...
3
votes
1answer
29 views

gdal java API returning different WKT from gdalinfo

I am running into an interesting bug where the wkt returned from dataset.getProjection() does not match the wkt returned from gdalinfo. (simplified) code: final Dataset dataset = ...
0
votes
0answers
5 views

Click event on anchor tag does not update Leaflet map as expected

I'm having problems updating a Leaflet map from a click event on an anchor tag located within a Leaflet Control on the map. Chrome and Firefox on Mac seem to have identical problems, Safari is ...
0
votes
1answer
17 views

How do you calculate latitude and longitude of a point in a static map?

Background: I have generated a static map (map.png) of a particular city using mapnik and osm data of the highest zoom level. I am able to zoom in and zoom out successfully using my Java program. It ...
0
votes
2answers
235 views

Create DEM with 1 foot contours from lidar data with 1.4 meter resolution

I have Lidar data which contains multiple .las files for an entire quad. I have figured out which .las is the area I am looking for. I was told the data is in 1.4 meter resolution and would work to ...
0
votes
0answers
8 views

Finding common segments in Shapely LineStrings

I have two identically-sized collections of Shapely LineStrings, representing two sets of routes from a common origin to a set of common destinations. For each "pair" of routes (i.e. set_a[0], ...
0
votes
0answers
4 views

geoserver css point stacker

I´ve read this article about geoservers pointStacker transformation: http://suite.opengeo.org/opengeo-docs/cartography/rt/pointstacker.html Is this function implemented in geoserver css? If so can ...
0
votes
0answers
9 views

spatial autocorrelation and calculation of autocovariate term

I was reading some literature on spatial modeling, where it is stressed that in using regression (e.g., the Generalized Linear Model family, comprising Logistic Regression for example) the possible ...
0
votes
0answers
18 views

Creating water utility network

A water treatment plant wants to create utility map that allows them to upload data in real-time through a separate monitoring service they subscribe to (through Verizon Wireless) and then use this to ...
1
vote
0answers
10 views

Adding separate distance files to calculate total distance in ArcGIS

I have two raster files: A raster of distance-to-outlet for a creek. Value = 0 at creek outlet (white), and the maximum value is at the beginning of the creek (black). A raster of Euclidean ...
1
vote
1answer
151 views

Retrieving proportion of pixels in R

I'm trying to retrieve the following pixel statistics: Proportion of zero value pixels: [nº of zero value pixels / (total nº of pixels - nº of NA pixels)] Proportion of pixels smaller than 3rd ...
3
votes
1answer
177 views

How to map flood areas from a set of points containing surface and height of water?

I am working on the damages made by the typhoon Haiyan. I use QGIS 2.0 with extensions and toolbox, and MapInfo. I have vectors, rasters of the place. I want to map the flood area along the ...
0
votes
1answer
9 views

What causes the Leaflet JS Providers error; Uncaught Error: No value provided for variable {time}

I am using leaflet providers and attempting to add the NASAGIBS.ViirsEarthAtNight2012 to my layer control, my other basemaps load fine; but this one doesn't and returns the following errors in the ...
-1
votes
0answers
20 views

new shape file addition problem

I am using QGIS 2.8.2 version, me unable to add new shape file layer. After drawing the line when I right click the mouse the line was disappearing (fig2). The new layer being shown in layer window ...
0
votes
1answer
25 views

'Capturing' Polygon Surrounding a Point [on hold]

I am attempting to 'capture' multiple polygons that are associated with points. I am attempting a create a shapefile layer with all of the taxlots associated with an entity. The problem is that the ...
0
votes
0answers
48 views

migrating from arcgis server to open source gis technologies --> what mapserver and tileserver should i use? [closed]

I am migrating from ArcGIS server backend to open source technologies. I have about 100 map services (~300 GB data) each with 100+ layers. I also have a web application where the user has to have a ...
0
votes
1answer
137 views

GRASS i.landsat.toar returns empty raster

I am trying to use the GRASS module i.landsat.toar. Currently the files created are empty and it spits out: So it seems that it is not picking up something? The location is set to the extent of ...
0
votes
0answers
5 views

OpenSteetMaps: Rendering Problem

The Problem I've installed an OpenStreetMap Server on CentOS 7. When I go to render the tiles I get the following: renderd[25207]: Rendering daemon started renderd[25207]: Initiating reqyest_queue ...
-6
votes
1answer
41 views

Why there is no EPSG code in ArcMap? [on hold]

In Arcmap, when you right click on the layer >> go to properties >> select source tab there you see the properties of projection. I cannot understand why ESRI did not managed to add SRID EPSG in ...
0
votes
1answer
15 views

QGIS legend without print composer

I'm trying to export a series of images using the TimeManager plugin. I'd like to have a legend on each, to demonstrate why my datapoints are sized the way that they are (i.e. this circle size ...
0
votes
0answers
11 views

How to associate shape file with metadata in geonetwork?

I'm trying to figure out how I can link a spatial data set with my metadata record in geonetwork so that a person searching for metadata records could download the associated spatial data with the ...
0
votes
1answer
23 views

vb.net arcobjects - show fieldname

I try to show the field names (alias names) of a feature class. I found code snippet but I don't succeed to get it to run :( Can somebody tell me please what is wrong in the code? (System: Arcgis ...
1
vote
2answers
36 views

Google Maps Openlayer plugin not aligned with the OpenStreetMap building layer in QGIS

I am working on an OpenStreeetMap (OSM) building layer (I download the imposm geojson in city Dar Es Salaam, Tanzania from https://mapzen.com/data/metro-extracts and used the building layer) and the ...
-1
votes
0answers
23 views

What aspects of GPS technology are proprietary? [on hold]

What aspects of GPS technology are proprietary? Could I make my own GPS and sell it to the public?
1
vote
1answer
150 views

Arcgis address locator issue

I have an issue with creating an address locator on arcgis 10.2.2. I always used an address locator somebody else made, it's made on arcgis 9.2. When I look into its properties, it says Description: ...
1
vote
1answer
16 views

Web map linked to database that shows one spatial location at a time

I have a simple database with a record for each research project that occured on a national forest. Each project area is associated with a polygon, and there are around 200 polygons that are piled ...
3
votes
0answers
26 views

Determining the best month for discriminating between different vegetation types?

I ordered and downloaded several (Surface Reflectance) Landsat 5-8 images from USGS Earth Explorer with the purpose of choosing a few of them to calculate some Vegetation Indices for each (NDVI, SAVI, ...
2
votes
1answer
24 views

Wrapping vector tiles generated by geojson-vt

I've followed the example in geojson-vt, and am able to generate vector tiles from my geoJson source. However, I can't read these tiles with mapbox-gl-js or Leaflet.MapboxVectorTile because I don't ...
0
votes
1answer
14 views

Cannot view OAuth Basic ArcGIS API for Javascript code sample in local drive

I admit this is a real basic question (I'm very new to web development), but when I try saving the contents of this OAuth sample on to my local drive, I cannot view it in my browser - the screen is ...
2
votes
1answer
70 views

Convert from shapefile or raster formats to LAS (preferably free)

I am looking for a solution to convert either from ESRI shapefile format to LAS or from a common raster format to LAS. I have access to following software: ArcGIS 10.2 for Desktop (arcinfo with ...
-1
votes
0answers
37 views

creating a database [on hold]

I have never created a database and had some questions while I am doing my research. I need the database to have maps and have access to files stored on my server, I think that is the correct ...
2
votes
1answer
148 views

Maximize clusters of points from coordinate data

So I am definitely new to the GIS world, so bear with me if I don't know the best way to articulate my problem. That said, I am ready to learn, I would definitely welcome any direction that you all ...
1
vote
1answer
10 views

How to force GeoServer to remove, or change, NoData Value from GeoTiff?

I am trying to display vector data of state borders, downloaded from GeoServer as GeoTiff, in QGIS. By default downloaded raster looks like this: After disabling NoData value in ...
0
votes
0answers
20 views

Query ShapeFile to get informations from coordinates

I have a shapefile that represents all the Hydrological Basins in the world. You can download the file from here: ...
25
votes
11answers
32k views

Where can I obtain an up-to-date list of US ZIP Codes with Latitude and Longitude Geocodes?

NOTE: This began as a question on Stack Overflow, which has subsequently been closed. I also noticed a similar question about Most Up-To-Date Source for US Zip Code Boundaries, but I believe this ...

15 30 50 per page