0
votes
0answers
2 views

QGIS Wien 2.8. Openlayers plugin doesn't work

I have installed the latest version of QGIS wien 2.8. Windows 8.1 downloaded the stand alone version from official QGIS website. I had to uninstall the latest one I had because Openlayers plugin was ...
0
votes
0answers
3 views

Automating Viewshed Analysis for 100+ points in ArcGIS for Desktop or QGIS? [on hold]

I am looking to create a script or some sort of work flow to analyze the viewshed of 100+ points (in a .KMZ file) using either ArcGIS 10.3. I can also download and use the most recent version of QGIS, ...
0
votes
0answers
3 views

When debugging ArcGIS add-in, can't use “Edit and Continue”

I've been working on this add-in for years, and just today set up a new computer with VS 2013 and ArcGIS 10.3. When I run my add-in from the debugger, breakpoints can be hit, but I can't edit when ...
0
votes
0answers
11 views

Transitioning from ArcGIS to QGIS (or other open source)? [on hold]

I work for a small City (under 10,000) that currently has an Arc Enterprise license. I am considering the possibility of steering away from Arc in the future (3-5 year time frame) - possibly to be ...
3
votes
0answers
11 views

Describing borehole information with geojson (javascript)

I deal a lot with borehole information and looking the best way to move it around in javascript / take advantage of javascript libraries (e.g. leaflet) for looking at this information on mobile ...
2
votes
1answer
20 views

How to draw contour lines with exact distance?

I am not a professional GIS user so am desperately trying to draw contours with exact distances around my samples (points). I have 67 samples and I would like to draw contours around these points. ...
0
votes
0answers
9 views

Georeferencing US County names in CartoDB

I have a massive file with county-level data from the 19th century. I'd like to georeference it, but I'm not sure what I need to do, as CartoDB isn't recognizing the county names through the 'Admin. ...
1
vote
1answer
13 views

Getting NULL-values when point sampling USGS (SRTM 1 Arc-Second Global) grid (QGIS 2.8.2)

I use the Point Sampling Tool in QGIS to transfer gridvalues (of DEMs) to point features. This goes well with grids from f.i. MapMart (SRTMHARRIS_DEM), but I get only NULL-values when using grids from ...
2
votes
0answers
14 views

Application of a Piecewise Logistic Function to Extract Seasonality Metrics

I am working with 16-day MODIS EVI (satellite) data and I want to fit a Piecewise Logistic Function through my 23 EVI data values. The following formula is for the Piecewise Logistic Function: y(t) = ...
-1
votes
0answers
13 views

How to assign contour values directly from raster extracted tiff [on hold]

How to assign contour values automatically from contours extraced from classified rasters...thanks
1
vote
0answers
21 views

Download Google maps data points

Is it possible to download google map data points? it would be usefull in order to gather in datasets all the restaurants in a dataset for example. I am using R but suggestions is other programs are ...
2
votes
0answers
10 views

Mapfish Print v3 - Blank map

I'm using Mapfish Print v3 to print a layer from the following link: http://webapps.sit.puglia.it/arcgis/services/Background/TNOInquadramento/MapServer/WMSServer To test the printing function I'm ...
-2
votes
0answers
17 views

Searching for an algorithm to filter Geo Data [on hold]

In the course of my Bachelor Thesis, I am searching for algorithms to filter Geo Data. I already found and researched the Douglas-Peucker algorithm. It would be helpful if someone could lead me into ...
1
vote
0answers
12 views

Joining Excel file with CityGML file using FME?

I want to join a excel file with a CityGML file with FME. i want to join the excel file with the geometry of the CityGML file. all attributes should join this file which settings should i choose ...
1
vote
2answers
22 views

Matching OBJECTID with a value at VBA in Arcmap

I got a building layer. And i got a table that contains 2 fields named SDE_OBJECT_ID and DOOR_NO. This table is not spatial table, it's Oracle table which i can join with my building layer if i want ...
2
votes
0answers
17 views

QGIS : transformation types in geo-referencing

Im a beginner in geomatics. I try some images georeferencing in QGIS. I would like to understand what is happening behind the different transformation types (linear, polynomial, Helmert...). What I ...
0
votes
0answers
18 views

ArcGIS and / or QGIS and UAV tech [on hold]

I see it has been almost a year since the last "UAV and GIS" question was asked here. Finding some incredible youtube videos recently showing remarkable results doing UAV and GIS together here and ...
4
votes
2answers
59 views

Meaning of GCP in QGIS

Im a geomatics student, During a geo referencing with QGIS, a .Points file is saved. I open it with Notepad++ It is written under this form : mapX,mapY,pixelX,pixelY,enable ...
1
vote
0answers
13 views

Error in merging two raster files (precipitation) in QGIS

The newly computed geotiff shows the extent of both raster layers, but only the data of one. If I use identify features tool it gives me only the values of the visible part not of the other part. I ...
2
votes
0answers
12 views

Why value relation doesn't work when I delete and connect reference layer?

I'm trying to connect reference table (domain) with data(text) to my vector layer (id's) using value relation. I have database in Oracle connected. It works fine, but when I delete the reference layer ...
1
vote
1answer
6 views

FileUpload UX plugin for Boundless?

I am busy building a web map app using boundless SDK. I am trying to implement a file up-loader, however, the majority of examples use new Ext.ux.form.FileUploadField When I try to use it in my ...
1
vote
1answer
20 views

trigger postgis and dump qgis 2.8.2

I created a trigger that checks if geometry is valid on insert and update. create or replace function check_geom() returns trigger as $$ begin --insert a polygon IF st_isvalid(new.geom) = 'f' ...
2
votes
0answers
15 views

Why does the QgsFeatureIterator crash in my stand alone script?

I'm trying to write a standalone script in qgis 2.10 in ubuntu I have written a script which crashes when I run from bash but works fine from inside the qgis desktop environment. The script is: ...
0
votes
1answer
40 views

Data copied from Excel to ArcMap layout view not exporting?

I prefer to use excel to make legends as I find it quicker than using ArcMap. Occasionally in some projects when I copy these in they appear fine in ArcMap, but some aspects don't export. ArcMap ...
2
votes
1answer
16 views

Help plotting lat and long coordinates

I have a set of lat and long coordinates whihc i have uploaded to be a table in mapinfo (the latest one) as you can tell i'm not much of a GIS wizz. I can't seemingly plot these coordinates in London ...
0
votes
0answers
4 views

Mouse events on ArcGisRuntime 10.2.5

I am upgrading my application from 10.2.3 to 10.2.5 In 10.2.3 you could add mouse events of MouseLeftButtonDown, MouseMove, MouseLeftButtonUp and MouseRightButtonUp on ...
1
vote
0answers
23 views

input range (0-2) values as a integer

Is it possible to input range values (e.g. 0-2,2-4, 4.5-5) in arcgis database as a integer or float so that it can be queryable. In database column it take input range values as a "text" which is not ...
0
votes
0answers
12 views

How to extract information from world file of images into a DBF catalog file through PYTHON?

Here are thousands of pictures in JPG or TIF format with world file such as jgw and tfw. Inside each file, projection information for each pictures were contained. One example of the content for a ...
0
votes
0answers
20 views

Reprojecting in Postgis

I try to reproject a layer in PosGIS using statement: UPDATE <table> SET geom=ST_Transform(geom, 3857); leading to error message: ERROR: transform: couldn't project point (574415 6.22508e+006 ...
0
votes
0answers
7 views

Import error: no module named _gdal_array

I am using python 2.7 and have gdal installed. I want to read an entire .jpg image at once and so I used statement import gdal from gdalconst import * driver = gdal.GetDriverByName('JPEG') ...
2
votes
1answer
25 views

How to perform viewshed analysis with Dutch AHN files?

i downloaded the new (dutch hight data) AHN files, and was trying to perform a viewshed analysis at some point near UTRECHT. The plugin (grass plugin) works ok, i tried it before with a dem map. ...
0
votes
0answers
3 views

Heron template deactivates overlays

I'm using the template of Google layers with an overlay of World Cities(OpenGeo), whenever I try to add some more overlays the application results in an error. It loads all the overlays but whenever I ...
1
vote
1answer
8 views

Problem with GetFeatureInfo on WMS

I'm trying to retrieve the informations about points around the mouse click. However if the click is not on the inside the symbol but just outside, the geoserver returns an empty response. To ...
1
vote
0answers
13 views

How to make Choropleth map using Openlayers 3?

I want to make Choropleth map in Openlayers 3 which is already implemented in Leaflet but not in Openlayers 3. how to integrate 'colorbrewer' in Openlayers 3? Give the working example of it.
0
votes
1answer
16 views

Polygon area calculation in Ruby (on Rails, rgeo, PostGIS and GEOS) in sqare meters

In a Ruby-on-Rails application, I need the area in square meters (or any other surface measure, be it ares, hectares, square kilometers, but not in pseudo surface measure like square degrees) of a ...
0
votes
0answers
17 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 ...
1
vote
0answers
12 views

Merge all features in polygon shapefile with gdal

How do I apply using this same concept, but simply merging all features into one? ogr2ogr output.shp input.shp -dialect sqlite -sql "SELECT ST_Union(geometry), dissolve_field FROM input GROUP BY ...
1
vote
1answer
19 views

How can I create polygons for a 3D map from a DEM in grass/qgis

I have a SRTM 30m DEM of my area. I want to create a physical 3D terrain map from it (from felt, 3D printer, you name it). I have two questions about this process: With grass r.contour I created ...
1
vote
0answers
11 views

Updating basemap and layers at same time using ArcGIS Runtime SDK for .NET?

i'm working with ArcGIS Runtime SDK for .NET 10.2.5, my app has different graphiclayers with objects that are continuously moving around the map (new position data is provided fastly), the problem ...
2
votes
0answers
11 views

How to export from WINSTAR to ArcGIS [on hold]

I have data in a very old "winstar" type of format. However, currently I only use ArcGIS for Desktop and QGIS. Does anyone have an idea on how I can import this old-fashioned winstar stuff to ArcGIS ...
0
votes
0answers
9 views

How to create custom tile cache

I have published my Postgis table as wms service with Geoserver. And I want to create my custom tile via wms. For example my map SRID is 4326 and uses OpenLayers. When I add my wms layer on map, wms ...
1
vote
0answers
6 views

Leaflet inbuild AJAX methods for WMTS getCapabilities request

I was wondering whether the Leaflet library has inbuilt methods to make AJAX requests. My goal is to create a plugin that makes an XMLHttpRequest request to a specified WMTS resource and parse the XML ...
1
vote
2answers
58 views

Limiting digits in ArcMap?

I am using ArcMap 10.2. I want to create a land information system, one of the features attribute data includes a citizen id field, it includes 11 digits, for preventing wrong value entering, i want ...
1
vote
1answer
27 views

Setting PDF page numbers/names when created by Export Map enabled with Data Driven Pages?

how to create PDF with Grid Number in Data Driven Pages i tried to export PDF but it is export with page no like 1,2,3..... but i want to export with Grid Number is there any way to export like that ...
0
votes
0answers
10 views

Projection and transformation [on hold]

How do I project GCS_WGS_1984 to Nepal_Nagarkot_TM? In the process of transformation if gives invalid transformation. What can be the solution?
1
vote
0answers
3 views

Include <link> in GPX when writing from ogr2ogr

http://www.gdal.org/drv_gpx.html seems to indicate that ogr2ogr should be able to write <link>[1] elements into a GPX file, however when using ogr2ogr to convert from PostGIS to GPX, I get the ...
0
votes
0answers
14 views

Map Not rendered Leaflet but renders correctly in opening console

I am loading a leaflet map rendering mapbox tiles, geojson layers (initially i dont show the map) and i also have tabular links which can be seen when the page loads, the links are list of places and ...
1
vote
0answers
12 views

Extracting Elevation-Volume Data of storage areas out of range

I was extracting elevation-volume data of storage areas using the HEC-GeoRAS extension of the arcmap. But it wasn't able to extract the elevation data and it appears "5, Index was out of range. Must ...
1
vote
0answers
17 views

How to correctly input complex multiband functions in Raster Calculator?

I'm trying to compute a MTVI2 (Modified Triangular Vegetation Index - Improved) and EVI (Enhanced Vegetation Index) from Landsat 8 imagery. My formulas are as follow (I'm using ModelBuilder): MTVI2= ...
1
vote
1answer
25 views

How can I change region style in MapBasic

I've problem with my code in MapBasic for change region style in MapBasic. I've created voronoi and I want to select that voronoi and change the style of it to yellow border and no fill. I already ...

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