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

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Changing the symbology of layer when converting from Layer to KML using Python

Is it possible to change the symbology of a layer file using Python? I have a script that creates a layer file and converts it to kml, but every time I run it the symbology color in the kml of the ...
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1answer
70 views

Import shp to Postgis using Python and ogr

I just export a Postgis Table to shp using this tips but I'm not able to import a shp to Postgis using the same library(ogr). Any idea? Thanks a lot f.
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0answers
42 views

Batch Clip (Editing Session)

I'm trying to correct some topology errors in my geodatabase, now focusing on two feature classes: grass and buildings. They must not overlap. However, there are plenty of spaces where the grass was ...
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3answers
454 views

How to find if two polygons Intersect in python?

I'm looking for an algorithm, high level solution, or even a library which can help me determine if two polygons intersect, in Python. I have the vertices of the two polygons (These are single part ...
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2answers
40 views

Using arcpy, is it possible to check if a thumbnail exists for a specified file?

I have written a very simple tool that builds thumbnails for every map document in a folder : root_fld stands for root folder and rec tells if search must be recursive. import arcpy import os import ...
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1answer
43 views

SyntaxError: invalid syntax (<string>) in Pl/Python (PostgreSQL) [closed]

I have python 2.7 and I have weather script which returns temperature infos, I would like to implement this script into PostgreSQL. I always got this error: DETAIL: SyntaxError: invalid syntax ...
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1answer
76 views

Is there a way to run a python script on opening a QGIS project?

I have a .csv file containing financial data which is generated on a regular basis outside QGIS. Then I want to create a PyQGIS script that will add the .csv file as a layer in my project. (The idea ...
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1answer
49 views

Purpose of “myPlugin_dialog.py” file created by QGIS Plugin Builder

I usually use QGIS Plugin Builder to create working templates for QGIS plugins. While a generic Python plugin needs the files below; __init__.py metadata.txt resources.py (translated from ...
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2answers
250 views

How to avoid ImportError: No module named arcpy causing Failed to execute (Script) error?

I have a proplem with arc hydro in arcpy,i want to create a simple script where automated some tools from archydro in arcpy.. I use arcmap 10.1 and python 1.7,my import is one dem and my export is a 6 ...
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0answers
19 views

Convert raster_stats list output to array / csv file

I usually program in R, but recently I have started to use python for most of my spatial programming. My python skills are still limited, and please excuse the simplicity of the question. I am ...
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1answer
44 views

How to identify a selected graphic element(s) in python

I have a situation where I am inserting items from Excel into maps a lot. When I insert the items it always makes them a fixed width and then adjusts height to maintain aspect ratio. What I would ...
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0answers
21 views

Points Missing on Import of LongLat data to SHP using ESRI script CreateFeaturesFromTextFile()

In ArcMap 10.0 I am using a 9.1-era ESRI script in Python called CreateFeaturesFromTextFile. There appears to be no ArcMap 10 update. The input text format is the strict format ESRI point,X,Y layout ...
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1answer
38 views

Is there an equivalent to arcpy.ImportToolbox() in 9.3.1?

Is there an equivalent to arcpy.ImportToolbox() using ArcGIS 9.3.1? I'm assuming it would use arcgisscripting instead of arcpy but I can't find any documentation.
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75 views

I could use some help with a bit of code optimization

See edit below. I posted here a couple weeks ago looking for some advice on the best way to iterate through data. You can find that post here. I have since done some tweaking to the code, and ...
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2answers
65 views

Get points from a kml LineString

I have a KML file with a LineString. I'm trying to load the points in Python. I'd like to use the FastKml library, but am open to other solutions. FastKml has one example for reading KML, but I have ...
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1answer
49 views

ogr2ogr/python overwrite PostGIS table

Using ogr2ogr command line I can overwrite or append to an existing PostGIS table like: ogr2ogr -f "PostgreSQL"-overwrite PG:"host=myserver port=54321 user=user dbname=mydbname password=mypassword" ...
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0answers
41 views

using postgis function in pyqgis

I'd use Postgis function in Pyqgis script. This code: qsql="(select gid, id, St_Buffer(the_geom,200) as geom from archi)" uri = QgsDataSourceURI() uri.setConnection("ip", "port", "x", "x", "x") ...
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0answers
35 views

PyQGIS Dialog Plugin not resetting

I have written a PostGIS search plugin that works pretty well, except two things that I just cannot figure out a solution 1) When the dialog closes and then is reopened the previous query is still in ...
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2answers
55 views

Python script to check node / edge coincidence

I have written a script with arcpy to test node and edge coincidence. Each edge (line) should have a node (point) at either end. If this is true, the script does not write anything. If there is node ...
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1answer
36 views

Model builder to call python script

So I'm looking to write a script that can be called by model builder. What I would like this script to do is to select three records from a feature class that have the highest field values ...
2
votes
1answer
150 views

Can anyone see what I did wrong with this Make Feature layer function? (Arcpy) [closed]

So I am just testing this function by itself before I put it in my loop. So I run the test (Python 2.7) and I get a result saying that it was create, but I do not see it in folder I assigned it to. I ...
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1answer
36 views

How to schedule a model to run at a certain time?

I'm trying to schedule a model to run at a certain time and have found this ESRI Blog post which is providing a good start. What I can't figure out though is where in the importToolbox function I tell ...
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3answers
134 views

Problem with python script to control GRASS GIS from outside - How to import grass.script under Win 8.1?

I am working with GRASS 6.4.3 and python 2.7.6 under WIN 8.1. I am a novice with computer science and coding, and I have seen many posts including those:Is it possible to use GRASS GIS in Python ...
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0answers
44 views

How can I draw features on GeoTIFF in Python?

I have a set of data (coords + value) and want to turn it into a heatmap in GeoTIFF. Should I calculate pixels and set them as array, or there are shortcuts? This is what I do now: driver = ...
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1answer
46 views

automatic save outputs variables in the folder workspace using pyhon for arc map 10.1

I want to create python script with aim to import him in environment arcmap 10.1 and to make a hydrologic analysis because the scipt meybe can have many outputs raster file or feature class would ...
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1answer
40 views

visualize bounding box to a polygon

I try to make plugin in QGIS that compare 2 bounding box data, ex: (-32.61442167739459, -32.017601026186576, 13.015663782506067, 13.428145228091406) and (-38.6102467739459, -38.017601026186576, ...
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1answer
70 views

Using Python for Polygon Neighbors Analysis in ArcGIS 10.1: Script producing erroneous results

I'm struggling with a python script that is supposed to calculate a field for a polygon feature class. The calculation is of the average of a field value (P_TOT_DEV) for each of a given polygon's ...
3
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3answers
192 views

PostGIS: parse geometry wkb with OGR

I'm trying to pull a LineString geometry out of PostGIS and parse it with OGR (python bindinds). from osgeo import ogr import psycopg2 connection = psycopg2.connect("...") cursor = ...
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0answers
16 views

Able to circumvent QgsCredentials script called from Pre-execution

I've got a stored project that, when opened is connecting to my PostgreSQL DB, and is loading several layers. All good. I'm using a script that is called from Pre-execution (Processing/Options and ...
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0answers
41 views

Using ArcPy, is there a way to change the color of a symbol in a UniqueValuesSymbology object?

I have an template mxd I reference with several pre-defined layers. The only variable I need to modify is the color of certain symbols in the layer. I have tried to modify and dig around the Symbology ...
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2answers
74 views

I get an ERROR 000622 when it checks for arcpy.DefineProjection_management

So the purpose of my code is to create a loop that copies shapefiles from a folder to my folder and change its projection 'GCS_WGS_1984'. Each shapefile starts with the year follow by the month and ...
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2answers
43 views

What output colour format is expected by the QGIS data defined properties widget?

I'm trying to write a python function that takes a BGSREF attribute from a BGS geology shapefile and uses it to colour up the geology polygons of a shapefile. I posted my non-code working as a part ...
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0answers
37 views

Nearest road in the vicinity of a point without queries (openstreetmap)

I know that many similar questions about map fitting have been asked. Everywhere there were answers about sql queries like this: SELECT ST_AsText (ST_ClosestPoint (pt, line)) AS cp_pt_line, ...
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1answer
33 views

Tick boxes for a qgis plugin written in python

in a python plugin for qgis I want the user to be able to select one or more of several options via tick boxes. I imagine it to look like e.g. Qgis 2.2 tool "Vector" -> "Data Management Tools" -> ...
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0answers
36 views

QGIS Plugin to open metadata and show metadata information

I try make plugin to open and read metadata (.xml) and show information inside metadata like map scale, map fiture and bounding box and auto fill it to QLineEdit This code i use to open metadata ...
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0answers
33 views

ArcGIS Geoprocessing Service fails on data loading

I have a Desktop Script tool that works fine when run on desktop, but does not work when the results are turned into a geoprocessing serice. Running ArcGIS 10.2 on Desktop and 10.2 on server. I have ...
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1answer
77 views

Load and display a layer using PYQGIS

I'm having a go at using pyqgis from within the QGIS python console to load a layer from SQL Server and display it. I feel like I'm part way there but I'm having a real issue getting the layer to ...
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0answers
37 views

Getting “Segmentation fault: 11” with ogr in Python

This is the code I'm trying to run: In [1]: from osgeo import ogr In [2]: datasource = ogr.Open('testdata.shp') In [3]: datasource.GetLayerCount() Out[3]: 1 In [4]: layer = ...
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0answers
34 views

Suggestions on how to create an Owner Index for a Plat Book?

I've been tasked with creating a county wide plat book for publication this june. The cartography portion is fairly straightforward as I am using ESRI's Data Driven pages for ArcInfo 10 to produce the ...
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0answers
37 views

Algorithm to find coordinates at selected intervals along a polyline?

I am developing an algorithm to search down a river at selected intervals and return the coordinates. See below: def Downstream(start, interval, data, offset=0, out=None): if out is None: ...
2
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0answers
64 views

How to detect broken hyperlinks with arcpy?

I have zero experience with python but am trying to search for broken hyperlinks in a large gdb (temporarily converted to a shapefile)- Used code from a previous question (Hyperlink broken path - ...
2
votes
2answers
57 views

How do I load mapinfo mid/mif into geopandas?

I suspect this is a trivial question to answer but how do I load mapinfo mid/mif files into geopandas? While it's trivial to load and manipulate .shp files, I can't work out what code to use: Here's ...
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4answers
69 views

Formula to Check Latitude & Longitude is within Area without Google Maps Api

I got this Example Map SampleMap: http://techinfo.co.id/test/map.php I make Boundary Polygon shape , -6.875165174925262, 107.56293296813965 -6.882663904407988, 107.66730308532715 ...
2
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1answer
60 views

How to Export multiple selected features to PDFs with Python?

I have 77 polygons that mark areas of a satellite image that I want to export as separate PDFs. Each of the PDFs should contain just the polygon (and as much as the surroundings to fill out the data ...
2
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1answer
47 views

How to get output value from Feature Compare (schema) and append to existing csv?

I am working on a data integration project and am trying to single out feature classes which have a schema that varies from two base feature classes (one for point, one for polyline features). I've ...
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1answer
45 views

NameError: name 'QImage' is not defined [closed]

Traceback (most recent call last): File "", line 1, in File "F:/QGIS/bin/test.py", line 6, in img = QImage(QSize(800,600), QImage.Format_ARGB32_Premultiplied) NameError: name 'QImage' is not ...
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0answers
58 views

Error getting spatial reference as string in arcpy

I am trying to get the string associated with a spatial reference to print into an xml using arcpy and xml.cElementTree. Using the snippet: ... spatial_ref = arcpy.GetParameterAsText(3) ... Prj = ...
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1answer
23 views

How to refer to a variable from the conditional statement in the ExtractByAttributes function in ArcGIS 10?

Trying to use the ExtractByAttributes for rasters so that I have multiple attribute values that I want to extract. This works fine: myraster = arcpy.sa.ExtractByAttributes("source_raster", "VALUE IN ...
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1answer
61 views

Python Built-in Map and Zip function in QGIS 2.0 Processing Script--syntax error

I am attempting to run my Python script using the Processing Toolbox in QGIS 2.0. I've used the built-in Python function map() and zip() several times and am now receiving a syntax error even though ...
0
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1answer
43 views

Programmatically modify attributes for vector layer in QGIS

I am trying to programmatically modify attributes for a vector layer, using calculated values currently stocked in a dictionary. Any pointers on where i'm going wrong? my dictionary has the feature ...