3
votes
1answer
31 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
9 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
22 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
238 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
14 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
6 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
11 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
19 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
155 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
178 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
10 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
21 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
26 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
58 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
6 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 ...
-7
votes
1answer
55 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
17 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
12 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
25 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
42 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
29 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
30 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
15 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
38 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
149 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
21 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 ...
3
votes
5answers
5k views

How to convert LAS to GRID/Raster for ArcGIS input?

I was wondering if there is an option to convert LAS (LIDAR data) to raster or GRID format that ArcGIS could read it.
0
votes
0answers
5 views

Styling MSSQL Layers in QGIS

I have set up Ordnance Survey MasterMap as 2 MSSQL layers (area and text) which are working great, I can style the layers as I would do usually with shape files but I'm struggling to work if it's ...
0
votes
2answers
80 views

Featureclasses with attachments: objects cannot be updated outside edit session

I am writing an ArcMap add-in using C# with Visual Studio 2010 and ArcGIS 10.1. I want to add features to a featureclass in an Enterprise Geodatabase (ArcGIS Server 10.1 on SQL Server). This is my ...
0
votes
0answers
10 views

atmospheric correction using Grass

I am using i.atcorr for atmospheric correction in Grass6.4.4. I would like to add Landsat8 sensor to my project(build). If I copy the iwave.cpp file from grass 7, I get error messages. Do I need to ...
0
votes
0answers
25 views

OpenStreetMap building layer

I wonder how the building layer in OSM is generated? Are they generated using aerial imagery with automatic image segmentation/classification techniques or they are from crowd sourced tagging.
2
votes
1answer
502 views

Can I use an Update cursor with a versioned feature class which has attachments in ArcObjects .NET

I have a problem with my code (C# ArcObjects 10.1). We are trying to update and insert 10 - 15 rows at a time into a feature class hosted in ArcSDE 10.1 on SQL Server 2008 R2. We have a feature class ...
1
vote
1answer
9 views

External Standalone QGIS Application with Default Toolbars

I want to develop a standalone application and add the default digitizing and advanced digitizing tools in QGIS as-is on my application through PyQGIS. Is it similar the way you add the navigation ...
1
vote
1answer
23 views

Loop to check multiple polygons overlap in r

I have a set of polygons (available here: http://ulozto.cz/x39ELbFt/polygons-zip) created in QGis and processed in R. I would like to know if they are overlapping or not, and if yes, where is the ...
0
votes
2answers
257 views

Finding a Conceptual Site Modeling Software

I've been asked by my company to generate a conceptual site model for a project and I have no clue where to start. The purpose is to show groundwater flow through a few layers of rock either in 2D or ...
1
vote
0answers
19 views

Finding specific area with coordinates out of a lot of LAS data?

I would like to extract spatial data out of a great amount of LAS data. Unfortunately, there is no index or sth that could help me find which file is for what area. Also, it is not possible to ...
4
votes
1answer
1k views

Drawing irregularly shaped boundary polygon around set of LAS points using ArcMap?

I am working with a set of LAS data which is irregularly shaped, picture a starfish as the point coverage, surrounding the starfish may be water on one side, may be more land elsewhere but no points ...
1
vote
1answer
36 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 ...
0
votes
1answer
56 views

Qgis network analysis why find vertex return always -1

I'm trying to compute the shortest path between points using the QGIS networkanalysis library. But the graph.findVertex always return -1. Basically what I'm trying to do is : 1/ Given a set of ...
2
votes
1answer
399 views

Legal standpoint of using open source map data in proprietary software?

I am planning to use an API call to something like http://overpass-api.de/api/interpreter?data=... to gather raw GIS data for an application I am working on. Can anyone tell me if that affects my ...
0
votes
0answers
5 views

Steps to integrate Cesium.js with Mapguide Opensource

I render map in php mapviewer with mapguide opensource and postgresql/postgis and edit with mapguide maestro. What would be steps to integrate cesium.js?
1
vote
1answer
89 views

How to SELECT all points within a GeoJSON polygon in PostGIS

I have a GeoJSON polygon, and a table with lots of points. I want to SELECT all points that are within an arbitrary GeoJSON polygon. How can I do that with PostGIS SQL?

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