19
votes
5answers
14k views

Creating DEM from contours in QGIS?

Is it possible to make a DEM from contours in QGIS? I have a shp file (contours) and their heights, can I use QGIS for produce a DEM without using GRASS? I found this creating a dem from contours ...
0
votes
0answers
3 views

Setting color info without defining new instance of renderer

I have an esri map with five feature layers. Each also has an id, and it is used in a toggle layer function to update layer visibility in the map. For most layers, I just need to set one static color ...
0
votes
1answer
6 views

Creating DEM from topography map in QGIS [duplicate]

For my geology diploma project I need to create DEM from topography map my professor gave me to use as a base map. The map is georeferenced. My idea was to draw lines over the izolines of the map, ...
0
votes
1answer
675 views

How to install MapServer on IIS 7.5 with windows 7 OS

I want to use the map server in my asp.net application. For that one, I need to install mapserver on IIS. I am using windows 7 with 64 bit os. I have IIS 7.5 installed on my PC. Can any one help me ...
1
vote
1answer
19 views

Switching out layers but keeping the order the same (see figure) with ArcMap and Arcpy

I need to update the table of contents for a given .mxd by keeping a certain order but switching out the contents. I can bring in the new feature classes as map layers, and delete the old map layers ...
0
votes
0answers
4 views

ST_Intersection between MultiPolygon tables leads to gaps, missing intersections

I am trying to intersect two MultiPolygon tables, which are in the same UTM projection, and calculate the area of their intersections. I am getting some surprising results when I examine the ...
2
votes
0answers
16 views

GridCoverage2DReader not reading 16 bit grayscale?

I have a geotiff that has 16-bit gray scale pixels and GridCoverage2DReader instance only returns the nodata value. Yet both QGIS and uDig show the image and I see WGS 84 and EPSG:4326 for the geotiff ...
2
votes
0answers
17 views

ArcMap Polyline Renders Incorrectly Unless Project Reloaded

I am trying to get a graphic polyline to render over top of an imported shape file. I'm using C# with ArcMap 10.2.2. The issue I'm having is that the first time the polyline is created, it merely ...
3
votes
2answers
3k views

OGR Layer Intersection

I am using what I would describe as the most primitive method of doing intersection with OGR. The short script below describes how I do it. Is there a best way of doing this? from osgeo import ...
0
votes
2answers
18 views

Dividing an irregular polygon into sub-regions

I am trying to divide an irregular polygon into equal widths and am having trouble understanding the proper tool to use. I am in possession of ArcGIS and am aware that the Parcel Editor is the closest ...
0
votes
0answers
8 views

Grouping polygons by spatial attributes

I'm working with a dataset that contains millions of polygons representing leased properties. In many cases, there are multiple polygons that are drawn on top of one another (representing multiple ...
0
votes
0answers
2 views

Putting marker and save location in DB for Leaflet.draw?

Using Leaflet.draw, I managed to set a marker, but I need to save it to a database, so that when reloading the page again, it shows the marker that was saved. I'm not an English speaker, but I try. ...
4
votes
1answer
12 views

Extracting the cell size as a value to use in a calculation

I am creating a model in ArcGIS modelbuilder to buffer a line. I would like the buffer distance to be based on the cell size of a raster. The cell size may change depending upon which raster the user ...
2
votes
1answer
31 views

Z values in kml

My goal is to create a KML line and/or polygon where the z-values of the vertices equal the z-values from point data (where the csv has a Z field). So far, I have created a spreadsheet which, given a ...
3
votes
1answer
173 views

Initiating pop-up before accessing .net out-of-the-box web map?

I need to create a pop-up that initiates as soon as a user clicks on a web map, or accesses the link from another location. The map is an ArcGIS Server out-of-the-box .net app. It's for a disclaimer ...
3
votes
2answers
464 views

Custom Query Task

I'm building a web application in ArcGIS Server for .net and I want to create query task for each layer so that each query depends on the previous result query task, how can I do that?
3
votes
2answers
1k views

Disable Certain MapTips in Graphics Layer for ArcGIS Silverlight

I am using the ESRI Silverlight API to allow users to use the Identify functionality on a map. The graphics layer on this map is set to use Map Tips, and a pin will be applied to the graphics layer ...
0
votes
0answers
5 views

How do you add an image to a point location in ArcGIS 10.3?

I have a set of point locations (groundwater wells) and a graph of groundwater elevation for each location. Is there a way to show the graphs at their respective locations on the map, without having ...
1
vote
1answer
163 views

SharpMap Coordinate transformation Problem

Hey guys i want to transform my layers from SRID 31463 (Gauß Krüger) to Webmercator. Since SharpMap does only know webmercator and WGS84 i tried to create the Coordinate System 31463 by WKT and ...
0
votes
1answer
35 views

Geosearch Esri controls in leaflet

It is possible to disable the Geosearch Esri controls in leaflet after the first geocode search? When I run Chrome console and I select the search geocode icon this is the code: <input ...
1
vote
1answer
35 views

GDAL: gdalwarp wrong transformation to “South_Pole_Lambert_Azimuthal_Equal_Area” EPSG:102020

I am trying to reproject a raster that is defined in EPSG:4326 to EPSG:102020. Command used gdalwarp -ot Float32 -s_srs EPSG:4326 -t_srs EPSG:102020 -r near -of GTiff -co COMPRESS=DEFLATE -co ...
0
votes
2answers
26 views

Creating series of lines offset from starting points (ArcGIS, arcpy)

I've got a series of points representing generalized locations of trawling activity over many years. A single XY location can represent many trawling records. I'm attempting to create a series of ...
3
votes
1answer
29 views

Are there any spatial interpolation methods that take into account inequality constraints?

For example if I'm interpolating a water table map from groundwater levels measured in wells and I have a location where a well has gone dry, I don't have a measurement of the depth to water, but I do ...
4
votes
4answers
3k views

Bulk convert DBF to CSV in a folder ArcGIS 10.1 using Python

I would like to convert 1000 dbf files to CSV. All dbf files are in one folder and they have sequential names (S:\output_tables\tcb1.dbf, S:\output_tables\tcb2.dbf, S:\output_tables\tcb3.dbf, up to ...
0
votes
0answers
7 views

S63 Viewers with JavaScript API [duplicate]

I am in the process of developing a web interface for viewing encrypted ENC data (S-63) and was wondering what options are available to handle the rendering? I have investigated ArcGIS Server and it ...
1
vote
0answers
13 views

QGIS: Create a layer, edit and save. Where are my features?

I created a layer (e.g. point) in QGIS with QgsVectorLayer from memory: mem_layer = QgsVectorLayer("point?crs=epsg:32630&field=id:string","TempFile","memory") ...
1
vote
1answer
36 views

Building QGIS 2.8.6 on Win 7 32bit?

I'm trying to build QGIS 2.8.6 on Windows 7 32 bit using MSVC Express 10. The build process completes without errors, but with a bunch of warnings. When I run the qgis.exe after installation, it only ...
1
vote
1answer
221 views

Adding Texture to the sides of an extruded polygon in ArcScene

I've been using ArcScene 10.2.2 to create simple extrusions of building footprints and now would like to add textures to them to make them more realistic. I want to add textures to the sides of the ...
0
votes
0answers
122 views

Installing gisgraphy 4.0?

I'm been trying to get gisgraphy to run for a few hours but seem to get stuck at the exception being thrown below. I thought it might have been the gisgraphy-4.0-beta1 version of gisgraphy. I've ...
21
votes
3answers
7k views

How to efficiently read a kml file into R

I'm working with huge .kml files (up to 10 Gb) and need an efficient way to read them into R. Until now I've been converting them to shapefiles via QGIS and then back into R with readShapePoly and ...
1
vote
2answers
39 views

Snap polygon to grid (lat/lon)

I'm trying to code this in Leaflet, but the key is finding the formula to do this. Give a polygon (filled in the image), how can I expand it to fit a grid (lat/lon, outer line in image) ? This is ...
1
vote
0answers
11 views

QGIS Download getting stuck, NSIS error? [on hold]

I need to edit a DBF file, and I tried to install QGIS at http://www.qgis.org/en/site/forusers/download.html. However, none of the standalone installers work. I tried installing 32/64bit, ...
0
votes
0answers
12 views

Automatic Dynamic symbology or Attribute driven symbology? [on hold]

I have looked for a while now on this issue! There seems to be multiple leads dating back over eight years! Two dilemmas I have found myself trying to figure out. Is there a way to configure ...
0
votes
1answer
11 views

Dashes instead of “to” in mapinfo thematic legend

The thematic legends for ranges are automatically set to the word "to", for example "10 to 20" "20 to 30" etc. I need to write it with a dash instead: "10-20", "20-30". Can I change the default ...
1
vote
2answers
20 views

ArcGIS Multiband Raster

I know this has been asked and answered here but since I don't have enough rep to ask a clarifying question to the person who answered it I am having to post a completely different question. I am ...
0
votes
0answers
3 views

OpenGeo Suite installed on Ubuntu 14.04, unable to proceed/delete issues with dependencies

I have installed the OpenGeo Suite on my "Trusty Tahr". I am able to access my Tomcat server as well as Geoserver on http://localhost. The issue I'm dealing with currently stems from ...
0
votes
0answers
15 views

Changing point data coordinate system without moving points in QGIS?

I made a mistake regarding coordinate systems and lining up two layers. I have a raster with elevations in EPSG:2949. I created a point data shapefile and entered about 600 hundred points manually ...
0
votes
1answer
17 views

CartoDB Mouse Scroll Wheel not Zooming

Here is my CartoDB map: https://tekim.cartodb.com/viz/1f42eaae-cad0-11e5-8e5c-0ecfd53eb7d3/public_map I have enabled (Options -> Scroll Wheel Zoom). Once I do this, I am able to use the scroll wheel ...
31
votes
9answers
1k views

News resources for GIS community?

I currently rely on a mixture of mailing lists, twitter and a couple of blogs. What do you use for your GIS media intake, and why?
0
votes
0answers
4 views

Metadata landsat incompatibility?

I compiled the last ledaps from source, but when I try to convert the MLT file to the espa xml format I get this error: Error: read_lpgs_mtl : Unsupported resampling option: CC It turns out that ...
1
vote
1answer
223 views

Faster way than Spatial Join to join field from attribute table to address table?

I have a table of addresses for every state in the nation. I just recently finished doing spatial joins and adding in census block/tract data per state. I have a national shapefile of ...
1
vote
1answer
1k views

Exporting PDF with Hyperlinked Attributes from ArcMap

I'm using ArcGIS 10.1 and would like to export a map to a pdf, preserving feature's attributes. I would like to be able to identify, for example, a point feature from the map on pdf with its ...
2
votes
0answers
18 views

Modify CSV file in QGIS before joining it to a shapefile

I've imported a Delimited Text File that I want to join to a shapefile I have. Unfortunately, the join field attributes have a pesky ' character before the actual string. I wanted to delete that ...
1
vote
0answers
27 views

How to avoid field duplication when joining two vector layers?

I have 2 point vector layers wich differ in 2 fields while both of them have the same number of fields (10). What I want to do is produce a new point vector layer with 12 fields. When I join the two ...
2
votes
1answer
41 views

Create default QGIS actions / define my own default actions

I have created a simple action that should be used to several users. Then, I'd like to put my action among their default action list. Put it simply, how can I create a default qgis action in a given ...
1
vote
1answer
33 views

error when merging geotiffs

I have a problem with a actually simple task: I want to merge 12 Geotiffs in QGIS. With Raster => Miscellaneous => Merge there is always an error saying: xyz.tif does not exist in the file system, ...
1
vote
2answers
22 views

Is there a way to get the vertices of segment of polyline?

I have a polyline with 3 co-ordinate, say (x1,y1), (x2,y2), (x3,y3). Can I get the vertices (x1,y1), (x2,y2) if clicked on line-segment drawn by (x1,y1), (x2,y2).
1
vote
2answers
281 views

gdalwarp changing value in nodata pixels

I'm using gdalwarp to convert MODIS NDVI mosaics from Sinusoidal to epsg:4326. To save space I'm using VRT files until I reach the final product. Here is my workflow. Mosaic NDVI Modis tiles using ...
2
votes
2answers
1k views

Automatically download Modis image using python script

I need download Modis imagery automatically from the website: https://earthdata.nasa.gov/. I found this link: http://gis-techniques.blogspot.com/2010/06/getting-modis-image-automatically-from.html ...
1
vote
1answer
1k views

MRT (MODIS Reprojection Tool) input error

This is my first time to use Modis Swath Tool to deal with images. I've downloaded 4 MOD44B granules (using the FTP script method), and am trying to use MRT to mosaic them. When I add the 2 files I ...

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