Python is an open source interpreted programming language used in many GIS programs.

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Calculating the closest distance between two points in ArcMap 10.2

I am looking for a script to calculate the closest meter to a set of addresses. I have a feature class of meters and a feature class of addresses. I have populated the address with fields for ...
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112 views

Automated attribute update geometric network

I have a Network Dataset of a storm water system containing two feature classes of points and lines. (All data is topologically sound with pits and pipes snapped and linework captured in direction of ...
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156 views

How to rotate u and v components of wind in rotated gribs?

I have a grib message of a rotated hirlam product. The grib message states, that the u and v component contained are relative to the rotated grid. How can I unrotate them?
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248 views

proj/pyproj converted coordinates offset

I'm using pyproj to convert some coordinates from WGS84 to OSGB36. When mapped out the converted and unconverted don't map to the same places on a map. The OSGB36 coordinates are mapped about 100 ...
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76 views

Deleting network features in python script doesn't create net junctions

I have a script that makes a copy of a network dataset for a 3rd party app to use. One of the junction feature classes causes problems with the app. The ideal solution would be to remove it from the ...
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264 views

Can ModelBuilder be used to export different versions of the same mxd with various constraints?

I am currently trying to use modelbuilder to go through each row in an attribute table, select the streets that intersect the polygon (which is the row in the attribute table), zoom to the selected ...
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464 views

Loop though records in PostGIS (using PL/PYTHON or PGSQL)

I've seen many example of loops, but I can't get that one to work. I work for a regional transit agency and each year, we conduct several surveys. I geocode everything to the house level for internal ...
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132 views

how to avoid Intersection of polygons via python code

i am using QGIS 1.8 and i can set the check box in Setting\Snapping Options "Snapping and Digitizing " dialog to avoid polygon intersections and enable topological editing but i am looking for a way ...
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517 views

How to integrate .NET application in QGIS using Python?

In our company we have developed a .NET application that's now integrated with 3 different GIS platforms. Now we would like to make it work with QGIS but we need some help on getting started. I've ...
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348 views

problem with WFS Data, GDAL, Python, ArcGIS, & Defining Projection

I'm pulling in data in gml2 format with a EPSG#4267 from a wfs. I create a datastream in python and then run the following from the python window in ArcMap: data = datastream.read() #write the gml ...
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146 views

How to shift vertices of shapes in shapefile using FOSS python library?

I need to shift each vertice of shape in a shapefile (of any type:point, line, polygon, multiline etc.) with Python. I need to loop in all shapes, get the vertices, get it's coordinates and for each ...
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355 views

XY event source layer problem (converts into feature class after running python script ) in ArcMap 10.1

I am using ESRI 10.1 suit (ArcGIS Desktop & ArcGIS Server, No ArcSDE) at my end and after running python script n number of times event layer converts into feature class. Following steps I am ...
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280 views

How to create multi-image single band single file geotiff?

I have a geotiff file that is single band but contains multiple subdatasets. I use gdal with numpy to open a specific subdataset and mask some of its values. Example: $ gdalinfo sample.tif ... ...
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76 views

QGIS Gazetteer Plugin connection to internal database

A few posts on here mention that the Astun QGIS-Gazetteer-Plugin could be adapted to reference a PostGIS database. Has anyone done this adaptation and could share it? I want to use a gazetteer stored ...
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419 views

Add metadata to dataset (feature class, coverage or shapefile) from a .csv using arcpy?

I am looking for a script that will take metadata information provided in an excel table, convert it to a .csv and import the values to populate some of the dataset's ArcGIS metadata elements. I came ...
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178 views

QGIS GPS bluetooth connection

I have setup a Haicom bluetooth gps on a machine running Windows8 and have used GPSGate to create some virtual COM ports. I have valid data arriving at the COM port, but then I run QGIS and try to ...
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47 views

Problem in analyzing data in a stream segment

I have to find out the head difference along the stream segment. For that I used Spatial Analyst Tool>Extraction>Sample. With that I got the elevation values in points. But after doing so, i found ...
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60 views

Ubuntu Raring - Openlayers Plugin 1.8 or 1.9 Master

Relative newbie to Ubuntu and QGIS. Many questions are posted relating to the Openlayers plugin. It works fine in windows but I cannot get it to work or even appear in either 1.8 or 1.9. The "fetch ...
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249 views

Python Script Producing Empty Cost Path Rasters

I'm trying to run a script that will create cost paths for a large number of randomly generated points then assign the cost to those points. But my script is beginning to create cost path rasters ...
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470 views

Install shapely for QGIS on Mac

I know there are a number of similar questions, but none of them have answers that allow me to use shapely in QGIS. In particular I am trying to install the Contour plugin, but this fails with the ...
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123 views

Subset a GeoTIFF image into regular grids and extract mean latitude, mean longitude, and mean RGB for each grid

How can I subset a GeoTIFF image with 1000 by 1000 pixels into regular square grids of 50 by 50 pixels (400 grid objects in total); and calculate mean latitude, mean longitude, and mean RGB for each ...
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569 views

Why does XYToLine_management give ExecuteError ERROR 999999 The table was not found?

I've written this script to import a csv file using ArcGIS' flavor of python.. ArcPy.. It seems to run fine up until the XYtoLine tool runs and then it fails.. This is the error message... Traceback ...
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278 views

SEXTANTE runalg and QgsVectorLayer issue

I'm trying to make a script for converting polygons to lines. But I'm having some issues while generating temporary layers. In this script, I iterate through all the features of the input layer to ...
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541 views

Python Addin toolbar- Environment mask parameter not being recognised?

I've created a button on a python addin toolbar which uses the selected features from the selected layer in the TOC, creates a feature layer from that selection and uses that feature layer to set the ...
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143 views

Python GDAL/OGR: check lines geometries connectivity

I'm working with shapefiles representing roads, so basically it's stored as (poly)lines. I need to perform a road connectivity checking. In other words, I want to ensure that roads meant to ...
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414 views

Problems running zonal statistics - not all zones represented

I have been working on a Python script to automate the steps illustrated by whuber here:Create points around the edge of viewshed results I am trying to create a horizon graph illustrating the ...
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281 views

Averaging satellite data with missing values (using Python)

I am using sea surface temperature, chlorophyll, and other data parameters as covariants in a model, and I would like to average them over a particular time period. I am currently doing this using a ...
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100 views

Clipping Buffers

I have buffered a line shapefile where many lines are intersecting but not broken at intersections. I am trying to select each record in the buffer file and clip all intersecting polygons in the same ...
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80 views

How to identify grid shift file used by osgeo in Python?

I wrote a Python script reprojecting points from a source coordinate reference system (SCRS) to a target one (TCRS) both identified by an EPSG code. I would like my python script to retrieve details ...
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728 views

How to transfer the attributes of features based on their spatial relationship?

I'd like to check if a point feature class is placed on a line feature using python in ArcGIS 10.0. I have created a set of point features and placed them directly on a group of line features at ...
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725 views

How to calculate average value within a polygon(in Qgis with Python)?

Now I have a point and polygon shapefile and I want to calculate the points' average value within each polygons How to do it with python? I tried to find out but google gives me a lot of raster ...
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510 views

Get the distance between 2 WGS84 GEOSGeometries

I currently want to check if 2 given GEOSGeometry objects of type Point are within 100m of each other. (length flexible) Looking at previous asked questions on this topic, most of the answers were ...
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119 views

Creating Raster with values based on function output

I have a function that calculates a price based on the input slope and distance. I want to write the price to a raster as the rastervalue. How do I do that? OpenSource and ArcMap solutions would work. ...
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246 views

Couldn't load SIP module - python disabled

Recently my QGIS started refusing to load SIP module, from day to day without any significant changes in the system (I'm on Windows7 x64). Message thrown at startup: Nie można wczytać modułu SIP. ...
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583 views

How to use raw_input() in QGIS python console?

I'm hoping to use raw_input() inside a loop to prompt the user when s/he wants to continue running the script. However, I'm getting an error: Traceback (most recent call last): File ...
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70 views

Python Program for “QC of PDFs Created from Data Driven Pages”

I need some help. I am fairly new to Python. I found a sample code and I need to change a couple things in it for it to work. I need it to make sure that all PDFs were created from the Data Driven ...
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67 views

Script Tool Problems ArcMap 10.0

I Have a scipt tool that runs when input shape files are added from the table of contents (added from drop down menu.) However this tool will not run when they shape files are added using the add file ...
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342 views

Why is not ST_GeomFromEWKB() working?

The following SQL is working fine from the terminal: SELECT MIN(ST_Distance( ST_Transform(ST_GeomFromText('POINT(-3.163916 55.926528)',4326),32630), ...
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171 views

Extract an ArcSDE datasets (rasters/shape files) using python?

I would like to write a python script to extract/export a dataset (rasters/shape files) in ArcSDE. I saw this posts to connect to the server: Define Workspace for SDE Connection in Python But how ...
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203 views

Table record counts change when using python tool

I have a python tool which investigates mxd files and clips/projects and exports all visible datasets. Recently I've found that the record counts (even on non-clipped data) is different. It's ok if I ...
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370 views

Morphometric and hydrological analysis with Python and ArcGIS

How can I write a program using python, that calculates some morphometric and drainage indexes using numeric attributes in the attribute table with ArcGIS? The data I have in my table are area and ...
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270 views

How to update polygon field with point count for multiple rows? (Temporal point-in-polygon)

I have a shapefile with several regions. It contains basic info like ID, Code, Name1, Name2, etc. It is overlaid with a shapefile of points (nearly 200k). Each point represents an event with a type ...
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122 views

Why does the method partCount in ArcGIS always give back a value of 1?

Does anyone knows why method "partCount" in arcgis version 10.0 always gives me back value 1, even when I have object with interniorring or multipart object? partnum = 0 partcount = feat.partCount ...
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640 views

How do I find the pgAdmin connection parameters?

I need to create a connection from arcmap to pgadmin using a python module because of an arcpy script, but I am unsure of how to get the pgadmin connection parameters. I think it may be some kind of ...
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369 views

How does QGIS execute Python plugins?

I am trying to run a python script from within a python plugin. The script runs a CGIHTTPServer in a separate thread. It works as expected when executed from the command line and i can issue requests ...
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128 views

Is it possible to script ISIS Mapper?

Does anyone have any experience of scripting or batch processing with ISIS Mapper? I am working on a large modelling and mapping project that will require the processing of significant numbers of 1d ...
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190 views

zonal statistics in Python crashes

I have a python script that works (it's worked for several other projects in the past and it worked for my current project initially). But whenever I run it, Python crashes sporadically. It would go ...
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103 views

How to get the geometry of a polyline to a specific precision?

In python, I use point = geom.asPolyline() but it looks like I am not getting any precision just whole numbers? How can I get the geometry and a certain precision?
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427 views

Why won't this PostGIS query display in QGIS

I am having trouble rendering the following PostGIS query in qgis1.803. SELECT s.musym, st_intersection(s.the_geom,f.the_geom) as geo, nextval('"soilsplittersequence"'::regclass) as k From ...
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242 views

Hack to change data source of a layer file in ArcGIS 9.3.1 with python?

I'm looking for a way to change the source of my layer file using python. Actually I want to do this because I need to re-use a XSL template which is defined under the tap HTML popup of the layer ...