0
votes
0answers
2 views

How to analyse point data as covariate for areal data

I have two data sets. a) a set of polygons with areal data variables. b) point measures of various co-variates of interest (note I do not necessarily have a point for each polygon) How do I correctly ...
0
votes
0answers
3 views

Building with MinGW 4.8

I'm working on a project where we would like to add QGIS features to an existing Qt application. The Qt application has been built with Qt5.2.1 using MinGW 4.8 and thus I think I need to build QGIS ...
0
votes
0answers
3 views

Preload tiles in OpenLayers 2 and add them to the map

I have an XYZ layer on an OpenLayers 2 map. Now I've written a function to preload all tiles of map.getExtent().scale(2). That works, but when I pan the map, the tiles still appear after a small time ...
0
votes
0answers
5 views

How to merge 2 shapefiles in ArcObjects

Using ArcObjects SDK for Java, I have the full path of 2 shapefiles: String in1, String in2, and I want to merge them using the geoprocessing tool Merge. I tried to several methods: ...
0
votes
0answers
6 views

QGIS 2.2: GDAL Grid (Interpolation) Error

As much as i understand Raster -> Analysis -> Raster (Interpolation) can provide me with a terrain file out of a shape file with a Z coordinate. I select the input and output file and a Z field. It ...
0
votes
1answer
14 views

Create Random points

I have polygon with an attribute which has numbers populated in it. I would like to create random points for each of the polygon depending on the attribute. How could this be done ??
-1
votes
0answers
22 views

How to return value into a python list using search cursor

I would like to retrieve the temporary value which are done from searchCursor. I want those values to be stored inside an array (preferably a 2D array, as i have to store objectid,x,y , also there is ...
0
votes
0answers
22 views

back up of qgis file

Can we recover a previously saved version of qgis file? For example: I have saved my qgis file about an hour but I need the yesterday's back up of qgis file. The file which does contain today's saved ...
0
votes
1answer
10 views

How to get feature from PostGIS to OpenLayers with ASP.NET?

I need to show my feature from this table in PostGIS in my ASP.NET web page web. Has anyone done that?
2
votes
0answers
22 views

Are the functions in OGRPolygon accessible through the python bindings?

I'm currently trying to use the OGR python bindings to process some shapefiles. I want to obtain the number of interior rings in a polygon feature. Unfortunately I'm unable to use the documented ...
0
votes
0answers
7 views

Get LatLng coordinates from SIRGAS2000 UTM 21s coords

I have a bunch of locations (36k) and they are represented using SIRGAS2000 (UTM 21s) coordinates. I need some way of converting them to traditional LatLng format so I can upload them to my database ...
0
votes
1answer
16 views

Where can I find historic aerials for some areas in Dona Ana County, New Mexico?

How do I find several historic aerials from the mid-1970's or early 1980's and where can I download them and I would like them to be free of charge. Cheers,
0
votes
0answers
11 views

How do I use QGIS 2.2 to plot some locations on a map (of the US by zip code)?

I am a newbie to QGIS. I just installed it on my MAC Airbook with Mavericks. How in the bloody heck do I simply plot a few locations on a map of the US? All of the tutorials I can find on the web ...
0
votes
0answers
13 views

Gdal setGeoTransform error

I am using the raster_stats program in python to calculate zonal stats. Raster_stats seems to heavily depend on gdal, and I am running into some trouble: Gdal does not seem to be open the tiff file. ...
0
votes
0answers
10 views

Raster vs. Raster Scatter Plot in ArcGIS

I created two raster datasets from the same world view 2 image. One dataset is NDVI, the other is a normalized surface water index (NDSWI). I would like to create a scatter plot for a pixel by pixel ...
0
votes
0answers
12 views

How to change Curve Numbers for Measured Effects using HEC-GeoHMS?

Good afternoon everyone. I'm working on a theoretical project of a proposed watershed for a final project, and am using an extension (HEC-GeoHMS) which I've never used before. I'm dealing with some ...
1
vote
0answers
21 views

How can I make ArcGIS 10.2 overwrite folders instead of pasting a new/copy folder (with a (1) suffix?)

Just upgraded to 10.2 from 10.0 and I have always edited data on the C: drive then pasted this updated folder onto the "work" server. In 10.0 the folder is overwritten. In 10.2 the folder is copied ...
0
votes
0answers
12 views

WmsGetFeatureInfo not working in larger scales

I use Openlayers/Geoserver on ubuntu server. Geoserver runs at tomcat6. I have grouplayer of several layers all shown at certain scales. When I click at feature at small scale, getfeatureinfo works. ...
2
votes
0answers
11 views

Error in unionSpatialPolygons using R

I am migrating from ArcMAP to opensource GIS. I've succesfully installed R and many packages in a Ubuntu 12.04 machine. I am used to linux and programming in C, but not to R and its syntax. I am ...
1
vote
1answer
60 views

How to make traffic time contour map in ArcMap?

I want to make travel time contour map which shows the area people can go from an origin (e.g. downtown, airport) within certain time interval. I have a roadway linear shapefile with the information ...
0
votes
0answers
21 views

Excel Nad83 table to gpx-Total noob

I have some waypoint locations that I have entered into a spread sheet in Nad83 the format of table looks like this NAME, -, -, UTM ZONE, Easting, Northing, -, Comment 1184236, 1, CP, 15, 451596, ...
0
votes
2answers
35 views

How to find a point some n meters away from lat/lon

How to calculate x meters towards East and y meters towards North of a lat/lon? Lets say I have a point 34.1940751,73.51049 I want to calculate lat/lon of the new point some 3250193m East and ...
1
vote
1answer
15 views

Including two different maps in one QGIS Print Composer

How do I use print composer in QGIS 2.0.1 to produce a final product with two different maps on the same sheet? I can't figure out how to use the 'add a map' button to add anything other than a ...
-1
votes
2answers
47 views

Use VB to calculate an area of a shape

I'm using Arcmap 10.1, running python 2.7 on a Windows 8.1 machine. I have a script that uses the arcpy.CalculateField_management function to calculate the area of a shape, however, for some reason ...
2
votes
2answers
31 views

How to populate fields for line segment with value from polygon to left and right of it?

I have a countywide roads dataset that is used by an emergency dispatch system. There are two fields, "Comm_RT" and "Comm_LT", that need to be populated by the name of the community polygon they ...
0
votes
2answers
18 views

QGIS radius buffer question, can it be more circular?

Conundrum for the day, When I request a radius buffer in QGIS (Dufor). my buffer comes out as a 20-sided polygon rather than a true "circle". This has lead to some missed blocks when clipping ...
1
vote
0answers
25 views

How to get Drainage Divide and Streams from DTM

Does anyone know how you can get a map like this attached, having the digital terrain model? I'm sorry, but I do not know what is the exact technical term in English for them. I hope you understand ...
1
vote
1answer
27 views

Can I resume (continue) digitizing a polygon feature from any vertex?

When I digitize in ArcMap with a Wacom tablet and a pen I often accidentally double click and finish my sketch. More often then not the accidentally finished sketch crosses itself. I would like to ...
0
votes
0answers
21 views

Wind Farm Viewshed/ZTV

I've created an ArcGIS tool using ModelBuilder and Viewshed to create a wind farm ZTV and whilst each raster cell tells me whether there's visibility or not it doesn't tell me what the vertical angle ...
0
votes
1answer
19 views

How to limit number of decimal digits in ArcGIS to have exported file in CAD with same format?

I am supposed to have some numeric values in ArcGIS 10.2 for Desktop with 3 decimals Digits and then convert them to Microstation or AutoCAD. I did this Setting using field calculator and 'round' ...
0
votes
0answers
11 views

Optimize openlayers / Geoserver 2.5 with GeoWebCache - reprojection necessary?

I have an openlayers map setup with several base layer options (some served by my own GeoServer) and many optional layers served by my own GeoServer. I've selected Google's EPSG:900913 as the map's ...
0
votes
0answers
20 views

Why do the SHP lines in QGIS Android look jagged (very simplified)?

I use QGIS for more than five years. I'm trying to make my way with QGIS Android for a while now. For some time I experience the following problem with the "nightly build" 2.0.1-Dufour: the SHP lines ...
0
votes
0answers
9 views

QGIS: Clipping a line layer using a polygon and getting an empty shapefile

I am using QGIS 2.2.0 and want to clip a line layer (roads) so that only those inside a polygon are shown. When I do this using Vector->Geoprocessing Tools->Clip I only get an empty shapefile as an ...
2
votes
2answers
57 views

Help opening GIS files [on hold]

I was given 8 files that supposedly contain GIS data. They appear to be a file split into parts and are named: "stuff.zip [1_8].dat" , "stuff.zip [2_8].dat" , etc.. I tried stripping the ".dat" but ...
0
votes
2answers
33 views

How to Convert Interpolated Map to Excel using ArcGIS for Desktop?

I have interpolated some SO2 data using IDW and have calculated means on county level using Zonal Statistics. I would like to convert this data now into an excel file. I already got the hint, that I ...
0
votes
2answers
22 views

Reading a raster map cells values in C#?

Suppose I have a raster map file (TIFF, TGA, JNG... etc) loaded with geo-info manifested by the cells values. I need to read the values of the raster map cells "programatically" in a C# program. P.S: ...
2
votes
0answers
16 views

Programmatically change layer position in the table of contents (QGIS)

I am trying move/position a layer to the bottom of the TOC by using addTopLevelItem on all other layers. I unsure how to reference the layers as QTreeWidgetItem's. def bg_bottom_level_item(self): ...
0
votes
0answers
17 views

MODIS images set CRS and reproject

I am developing a plugin which reads MODIS images, and I know that MODIS images are in sinusoidal projection and I need to set that CRS and project the image to WGS84 (epsg 4326) in python. I search ...
0
votes
0answers
7 views

WPS Client implementation in our desktop

how to implement wps client in our system and also specify requirements needed. How to specify the proxy to the OpenLayers.ProxyHost = 'proxy.cgi?url='; var map, client, intersect, buffer; function ...
0
votes
1answer
15 views

QGIS 2.2 - expression string builder to ignore NULL values

Simply put, I would like to create a rule-based filter whereby you add 2 columns together and you get a certain colour as a result. However, some fields in Column_1 may be NULL and those exact same ...
2
votes
2answers
25 views

loss of attribute data when copying between layers

I am trying to copy points from one layer to another in QGIS 2.2 The problem I get is that all the attribute data from the copied points is missing when copied onto the new layer, the columns show ...
1
vote
1answer
29 views

Does SearchCursor reset work in ArcGIS 10.0?

In a script I have designed a function that is used multiple times on different search cursors to search through a whole table. Function variables: p - a list of points: actually a list of ...
0
votes
0answers
14 views

Errors when combining JavaScript samples

I was trying to combine different ArcGIS Javascript samples. Now the website displays in the browser, but i get 3 Errors in Firebug. dojo/parser::parse() error Error: Tried to register widget with ...
1
vote
2answers
19 views

How to perform IDW interpolation and mean estimation on county level using ArcGIS for Desktop?

I am absolutely new to GIS. I have imported a map with information in the counties of Germany. Additionally I have added a layer with information on SO2 concentration at various measuring stations in ...
0
votes
0answers
8 views

How can I use the SLD and SLD_body arguments?

How can I use the SLD and SLD_body arguments of a GetMap request with the mapA.overlayMapTypes.ImageMapType object? var wmsOptions = { alt: "", getTileUrl: function (tile, zoom) { return ...
2
votes
0answers
19 views

Why are ellipse polygones simplified when used in a FeatureService?

I have polygons with ellipse shape in a SDE Oracle ST_GEOMETRY geodatabase. All those polygons are correctly displayed when in a MapService. But when displayed in a FeatureService, some polygons ...
0
votes
0answers
20 views

What is the Python numpy equivalent of the IDL # operator? [on hold]

I am looking for the Python numpy equivalent of the IDL # operator. Here is what the # operator does: Computes array elements by multiplying the columns of the first array by the rows of the ...
1
vote
0answers
9 views

Use MATLAB mapping toolbox to connect to ArcIMS Server or Geodatabase connection

is there a way to connect to an ArcIMS server or to a Geodatabase connection using the MATLAB mapping toolbox? I see that it allows connection to WMS servers, but don't see how to connect to the ...
1
vote
1answer
9 views

Keep column titles when exporting SQL query in MapInfo

Is there a way to keep column titles when exporting a query in MapInfo as a csv or a new tab. This is my result: And my export looks like this: It's not a major issue, I jus like saving myself ...
3
votes
1answer
71 views

How to add an ID based on attributes in ArcMap 10.1

Given are: a polygon shapefile/feature class (FC) containing municipal districts a point shapefile/FC containing locations of, lets say, trees. My goal is to append an unique value (1, 2, 3, ...) ...

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