2
votes
2answers
578 views

Tabulate Area in ArcGIS for Desktop not creating correct output?

I have used the Tabulate Area zonal spatial analyst tool in ArcGIS many times, and am encountering a problem for the first time. I am using a polygon grid (fishnet) as my zone dataset, and tabulating ...
0
votes
1answer
16 views

Using custom kernel in ArcGIS focal statistics?

Working with ArcGIS 10.2.2. Want to operate with the focal statistics and created my own kernel in xxx.txt. But when I choose "neighboorhood: irregular" the kernel input is greyed out. (Define ...
0
votes
0answers
5 views

ArcGIS Pro calculate multiple text fields based on other fields [on hold]

I have an attribute table with two types of text fields (34 of each). One type attributes an "r" or a "d" for each feature. These fields represent the voting results in either presidential or ...
4
votes
1answer
524 views

How do I link OGR with spatialite?

Problem & Evidence: I'm trying to create a spatialite file with the code snippet below. However the outDataSource object gets assigned NoneType and all subsequent (unshown) code fails. I'm ...
5
votes
0answers
125 views

Determining Thalweg line of river without bathymetry?

I have the boundaries and centerline of a river. The Thalweg line defines the deepest elevation of a watercourse (see Image taken from Google). I do not have accurate enough bathymetry or Digital ...
0
votes
0answers
4 views

Why does my reprojected globe visualisation not draw?

I have followed all of the instructions in QGIS Map Design, Graser and Peterson, Locate Press 2016, and cannot get the visual of the reprojected shapefiles clipped to Rome coordinates to draw as in ...
0
votes
0answers
63 views

Seeking geoprocessing tool to find all DTED tiles that intersect an Area of Interest (AOI)?

Does a geoprocessing tool exist that can find all DTED tiles that intersect an AOI? I have a area of interest represented by a polygon and DTED tiles (some of which intersect with the AOI). Is ...
0
votes
0answers
110 views

Copy Raster Catalog from .mdb to .gdb, but only within a certain extent with arcpy? [on hold]

I am trying to copy a raster catalog from a personal geodatabase to a newly created file geodatabase but only within a certain extent. Using the script below gives me a new file geodatabase with a new ...
0
votes
0answers
778 views

Bearing Distance to Line tool from dBASE table only draws one line in ArcGIS 10 [on hold]

I am using the Bearing Distance To Line tool to draw geodesic lines to points defined by a bearing and distance. This is an aside, but I will then use the Feature Vertices To Points tool to convert ...
1
vote
0answers
6 views

ArcMap MODIS NDVI for district in India? [on hold]

I am working on 159 HDF files for the India subcontinent. I am trying to get min, max, standard deviation from the different districts of India using shapefiles. How do I make all the HDF files to ...
6
votes
1answer
283 views

Are there any Objective-C frameworks for shapefile drawing?

Hello can someone point me to library for this? Which can read .shp files and render them?
0
votes
1answer
41 views

Free high resolution DEM or Lidar data for St Lucia

I found the 30m Aster DEM for St Lucia, but am wondering if there is some DEM or other elevation data source (Lidar) with a higher resolution. I googled, but have been unsuccessful in finding any free ...
2
votes
1answer
45 views

Add qlr file in QGIS- problem

I work with a polyline layer: and the layer located in "G:\desktop\qgis\lyr". After i save the layer in qlr file and saved it in "G:\desktop\qgis\lyr", i try to load the qlr file with "add from ...
1
vote
1answer
9 views

Changing projection of PostGIS data? [duplicate]

I have exported osm data using osm2pgrouting in the database, it has SRID 4326. I want to change projection of all the tables created to a particular SRID in UTM. I read the post FIrst and Second, ...
25
votes
3answers
10k views

Reprojecting all geometries in PostGIS table?

I created a spatial table with SRID:4326. Now I want to change total projection to SRID:32644 into a new table. The old table should remain unchanged.
1
vote
1answer
251 views

Validate StyledLayerDescriptor (SLD)

What is the best way to validate SLD? I'm using geoserver-manager but i cannot find any method to validate SLD. Even if i publish invalid SLD over geoserver-manager the response is 200 OK but it is ...
0
votes
0answers
8 views

Associating a specific location to the appropriate street centerline

I need to determine which street centerline within openstreetmap is the best match to a particular location triggered by capturing a location's lat/long via a mobile device. So far the best I could ...
0
votes
0answers
5 views

How do I connect my Python script external to the Grass GIS 7 program in Windows 10?

I've tried to find resources online to link and run my Python script externally from Grass GIS 7, however, I have not been successful. I found resources here that provide instructions (e.g., https://...
1
vote
1answer
189 views

Failing to use ArcGIS map as basemap in GeoNode

I'm trying to add the ArcGIS map service to my project in GeoNode but I'm failing to do so. I've read around and I saw information that says I need to make a XYZ tile service (something like this: ...
0
votes
0answers
9 views

Equivalent of “merge divided highways” in R

I want to make a map to print out based on openstreetmap data, and have successfully loaded the data into R, the programming language I'm most familiar with. To make things look nicer, I want to ...
2
votes
2answers
313 views

Export OpenStreetMap paths to KML

Is there a way to export OpenStreetMap public transport routes to a KML or KMZ file? I'm trying to view the routes in another application (Google Earth) which supports KML data, but doesn't support ...
1
vote
0answers
117 views

Kernel density change detection

I want to detect change in two kernel density estimation rasters of animal sightings. These were created using the same bandwidth (and I'm assuming the same kernel function?) in ArcGIS 10.2. I want to ...
0
votes
0answers
5 views

Dynamically adding controls onto MapBasic dialog?

I have seen a lot examples with dialog creation, like: Dialog Title "Title" Width 198 Height 52 Control Button Title "Обзор" Width 50 Height 15 Position 133, 6 ...
1
vote
1answer
9 views

QGIS: SAGA-GIS module “Add raster value to point” Error: unknown option 'INTERPOL'

I encountered an error while using the "Add raster value to point" SAGA-GIS module in QGIS (2.16) to retrieve altitude values from a raster DEM previously interpolated from TIN points (as vector ...
1
vote
1answer
317 views

Pass coordinates parameters to geoserver pgrouting service from Leaflet wms tile layer

I've configurated a pgRouting service in Geoserver, following the steps on the documentation it's easy to accomplish. Reading the documentation, existing examples, etc.. I've come to undestand how ...
0
votes
0answers
11 views

How to add delay to a network element

I have a road network. I need to implement a delay to a few points on my network (which will represent gates, that take 3 minutes to open). I have used turn feature class before but due to some ...
2
votes
0answers
18 views

QGIS GRASS: Error when converting vector to raster

I am trying to convert a vectorial layer (a grid of regular points with values, representing probabilities, associated to each point). I tried to use QGIS, but I got this error: ERROR 1: Attempt to ...
0
votes
1answer
14 views

Furthest point from polygon/point

I want to calculate distance between smaller dots (they represent towns, villages etc.) and these larger red dots (capital cities of admin. region). My goal is to show wich location is the furthest ...
0
votes
0answers
21 views

Iterating through multiple polygons in file using ArcGIS ModelBuilder? [duplicate]

This question is a lead on from this question which was not resolved: Iterating through multiple polygons to produce a table with elevations using DEM? I want to iterate through each polygon in a ...
0
votes
0answers
28 views

How to project 2D (poly)lines and polygons on a point cloud or a (tri)mesh (TIN)?

I'm searching a way to project 2D (break)lines and polygons (they are in an ESRI shapefile but I can translate them to something different if needed, like geojson for example) on a point cloud (seems ...
-1
votes
1answer
24 views

Pipeline data on Nigeria?

I am looking for oil and gas pipeline on Africa or Nigeria. I have tried searching the global energy observatory platform and I cannot find it.
15
votes
2answers
812 views

GIS/Geospatial Podcast

I wanted to know if there are any free available to download informative GIS/Geospatial audio or video podcast other than ESRI Instructional Series Podcasts and Speaker Series Podcasts in the market. ...
0
votes
0answers
26 views

Clipping a Raster [on hold]

i m facing a strange problem. i created a mosaic of two landsat scenes. it contains values from ~ -5 to ~11 (Biomass estimation). As my Studyarea is much smaller then the mosaiced Landsat8- Scenes, i ...
0
votes
1answer
130 views

PostGIS Get the POINT that is x meters away from a fixed point on the route (LINESTRING)

We have a route network stored in the routes table (LINESTRINGs). Basically every sedment (between two vertexes) is inserted as a separate row in this table. Among that we have a locations table (...
0
votes
2answers
13 views

Add logo to a map using Leaflet/Mapbox

I am currently trying to learn how to use Leaflet / Mapbox (and JS, to some extent) by creating custom test maps. My problem is that I want to add a logo on the top of my map, with absolute ...
0
votes
1answer
11 views

How to remove cloudy pixel from MODIS NDVI (MOD13Q1)

I am using MODIS NDVI product (MOD13Q1) for the vegetation changes study. I want to remove cloudy or bad pixel from MODIS NDVI data. I am not getting any suitable method or software or any program to ...
0
votes
1answer
18 views

Longitude difference to Meters

I have been trying to find an effective method (be it an equation or table filled with values) that would be useful for converting differences in longitude values into a distance in kilometers. It ...
1
vote
1answer
6 views

How to download all OSM data within a boundingbox with Overpass?

Is it possible to download openstreetmap by direct link through http://overpass-turbo.eu without removing any data? Basically I am trying to download the openstreetmap data with defined boundaries in ...
1
vote
1answer
332 views

Submit empty string via POST wfs in GeoExt.form.FormPanel

I have a two textfields in FormPanel. When one of them is empty, after pressing the search button the form sends the empty string in WFS query. How can I disable the empty field which sends the WFS ...
1
vote
0answers
16 views

Seeking data for residential maps (buildings, roads, etc.)?

I am developing an application which requires heavy styling of maps (at a street level, zoom 16 would be ideal), so I'd like to simply take in the map data and draw the polygons myself. However, the ...
0
votes
1answer
17 views

Python code in ArcGIS field calculator error?

I've tried writing a code block using the Python Parser of the ArcGIS Field Calculator. Here's what I am trying to achieve: There's a field in my attribute table with values for some, but not all of ...
11
votes
1answer
324 views

PyQGIS save raster as rendered image, then use GDAL tools on it

I have tried to use the code from QGis Save Raster as Rendered Image. i is a raster layer: pipelayer = i pipeextent = pipelayer.extent() pipewidth, pipeheight = (pipelayer.width(), ...
2
votes
1answer
10k views

Calculating longitude length in miles?

Suppose I have geographic coordinates of "Saratoga, California, USA" as Latitude: 37°15.8298′ N Longitude: 122° 1.3806′ W I know from here that in case of latitude 1° ≈ 69 miles and that ...
1
vote
1answer
214 views

Polyline graphics not displaying in Javascript API?

I am getting features (graphics) back from an IdentifyTask, setting a symbol and adding to a graphics layer. Polygons and points show up just fine, but not lines. Has anyone else encountered this? ...
2
votes
2answers
418 views

Extracting country specific data from planet openstreetmap big file

I am trying to obtain few old osm dataset of few specific countries/regions to see subsequent changes till now. I am using planet osm files which I think is the only source of old osm archieves. But ...
0
votes
1answer
237 views

limiting circles to a specific radius

I am new to ArcGIS javascript api and I have created a map which allows users to draw circle geometries. I just want to limit the functionality so that the radius is specified at 10000km. This is ...
1
vote
1answer
397 views

Exporting data from Cartodb

I'm using the world borders common dataset from CartoDB, which I've then exported so I can grab the_geom column, which CartoDB gives me as a hex value. I'm taking this CSV and uploading it another ...
0
votes
1answer
9 views

Installing spatialite-gui using ubuntugis

I am unable to install spatialite-gui using the ubuntugis unstable ppa. There appears to be a conflict between the GEOs libraries required by QGIS, which I installed first successfully (GEOS 3.5.0 ...
0
votes
0answers
8 views

Amending existing plugins to match Qgis 2.16+ fTools removal

Part-time development started about a year ago to create an add-on for Qgis. Many of this plugins capabilities are written with fTools commands. I am wondering if there is a recommended document to ...
0
votes
0answers
4 views

How to change info div based on baselayer selection?

I'd like to change the map logo in a info div based on the baselayer selection. For what I understood I have to use events but dunno how. Here is my code: map.on('baselayerchange', function(...

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