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

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456 views

What causes Scripting Error 000714 in ArcGIS when using GetParametersAsText? [closed]

I am trying to create a script tool in ArcGIS 10.2 in order to incorporate into a model. The script needs to incorporate three inputs which i've built using GetParameterAsText function then setting up ...
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1answer
183 views

MakeXYEventLayer_management not creating final file?

I'm using python to generate x and y coordinates for the start and end of lines in Arc. I have successfully done this part but when I try and generate the nodes I have no idea where the output file ...
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1answer
461 views

CalculateField_management - updating fields with X and Y coordinates for start and end of line

I've searched all the help documents and can't see where my script is going wrong. I've tried adding the fields as FLOAT, replacing "PYTHON_9_3" with just "PYTHON" but it just doesn't work. The ...
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2answers
835 views

Counting Characters using Field Calculator - Arcmap

I am trying to use field calculator to populate a column based on the the number of characters in another column. I am using the Python Parser. I am not sure if the .count() function is appropriate in ...
2
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1answer
404 views

Mac OS X 10.6.8 QGIS not using user-installed Python 2.7

My QGIS does not recognize the recently installed python 2.7 on my mac osx 10.6.8. it still uses the python version 2.6 that is automatically installed by apple. Opening qgis I always receive an ...
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2answers
434 views

Whats a Python Script/Method to use to get the number of fields with data in an attribute table?

I am doing some data migration and need the number of records with actual data, sans null and blank fields, without switching back and forth with select by attribute. Ideally I would like to run a ...
2
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2answers
504 views

Update raster value to reflect total number of points within cell- python

I have what should be a fairly simple task, but I can't seem to figure out how to do it. I have to do it in python/arcpy/gdal/whatever because I'm trying to automate this process for a hundred or so ...
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1answer
33 views

GRASS module g.mremove returns irrational outputs

I want to use g.mremove to remove multiple files in my mapset, import os import sys sys.path.append(os.path.join(os.environ['GISBASE'], 'etc', 'python')) import grass.script as g import ...
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0answers
27 views

How to intersect widget using script python arcpy and geoprocessing service? [closed]

Is it possible to develop an intersection widget with geoprocessing service using script python arcpy? I try to do that with ModelBuilder but after publishing, in geoprocessing service i don't find ...
3
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1answer
404 views

How to use variables in arcpy tools which quote the variable name

I'm having a frustrating time trying to use the Create TIN tool within Python, when the input featureclass name is a variable. The help file entry for Create TIN shows a hard-coded path to the ...
0
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1answer
328 views

Gdal creating raster rotated wrong way

I have been trying to read in a stack of images for a timeseries and created an output raster that contains the max pixel values of the timeseries. The arrays were created using numpy img_stack = ...
3
votes
1answer
295 views

How to obtain the width and height of an image using arcpy

This Stack Overflow question shows how to obtain the pixel dimensions of an image using Python. Is it possible to find an image's height and width using arcpy and ArcGIS? arcpy.Describe would seem ...
2
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2answers
335 views

raster standard deviation stretch python script

I am looking for ways of applying a permanent standard deviation stretch to rasters via python script. Are there any arcpy raster stretch functions? I was looking for a reference but could not find ...
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2answers
1k views

Import CSV column into existing feature using arcpy

My goal is to take a CSV that contains 50 rows and one column and import the data into a feature class with over 3,000 rows using arcpy. I want to pick a random row from the CSV and then iterate ...
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1answer
110 views

Python in ArcGIS, CalculateField_management, updating with single value

I have a float field which I want to simply update all values with 1. I can easily do this within the field calculator but I have started using python today, what is the syntax to simply update a ...
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2answers
580 views

Why my python script of r.watershed has no output?

I type those code in pyscripter, import os import sys #set up GRASS environment variables sys.path.append(os.path.join(os.environ['GISBASE'], 'etc', 'python')) import grass.script as g import ...
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1answer
2k views

How to create a dock widget correctly in QGIS plugin?

I am building a QGIS plugin and would like to use a dock widget. I have used QT creator to design the UI, with the object type being a QDockWidget. When the plugin is enabled in QGIS the dockwidget ...
3
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2answers
3k views

Looking for Python module to do lat lon calculations

I'm looking for a Python module that can provide some / all of the following services using latitude/longitude to define points: Distance between two points Point in polygon Distance along a ...
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2answers
119 views

Separating a shapefile into separate shapefile based upon their features using a python script [duplicate]

I have a shapefile of a US. I need to make an individual shapefile for all the states in the US using a python in ArcGIS. How can I do it?
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0answers
125 views

Using iface.showAttributeTable() on QgsVectorLayer retrieved by getObject()

I'm unsure if i'm properly using the processing.getObject() function. I'm creating a python processing script for QGIS 2.0 and 2.2, but can't seem to get an attribute table to open programmatically. ...
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1answer
557 views

Python: Ray-trace a WGS84 point with heading and distance

One of my services defines geofences for a mobile app. The geofences consists of a lat/lon pair and radius in meters, in JSON, e.g.: { "geofenceId":"geofence_b39da38cff7be4b4693cbc31b2394bbb", ...
5
votes
1answer
430 views

ArcGIS - Python - Extend XY Line to Z Value

Long time reader, first time poster. So here's my goal: Working in ArcGIS, trying to work with Model Builder and Python Scripts. I have a series of lines and a single raster DEM. I'd like to extend ...
2
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1answer
490 views

Select by attributes within the fiona Python module

Is it possible to select polygons from a shapefile based upon their attributes using the Fiona Python module? I can't seem to find anything in the docs, but it seems like a strange thing not to be ...
2
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1answer
4k views

How do I select by location based on selected features with Python?

Is there a way with Python to do Select by Location with the Use selected feature option? I'm trying to automate a process and am running into barriers. I need to be able to select the 2 lines ...
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0answers
73 views

Programmatically add paramaters to ArcToolbox based on number of FCs in GDB?

I'm creating a custom geoprocessing tool. If a user inputs a GDB with a variable number of feature classes (FC), how can I retrieve and add a list of the FC to the tool? If the user doesn't add a ...
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1answer
247 views

Processing Script: now gives error in QGIS 2.2

I recently updated to QGIS version 2.2, and am now getting an error when running Processing scripts that worked previously (in version 2.0.1). Uncaught error while executing algorithm Traceback (most ...
2
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1answer
331 views

Transfer subtype Descriptions form long integer value into a string at new diffrent field

I need to convert entire geodatebase into shp files.One of the layers have 30 subtypes. I want and maintain the subtype data. Is there a way to Automatically populate the name of the subtype (Transfer ...
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0answers
24 views

slope in model different value than slope in stand alone script [duplicate]

When running slope(analysis) from model I receive a high value of somewhere around 71. After then exporting model as python snippet and changing only the output raster name (using same input raster) I ...
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1answer
792 views

Adding attribute list to combobox in a python plugin

I am developing a simple plugin at the moment which contains 3 combo boxes: comboBox_1 comboBox_2 comboBox_3 Combobox 1 & 2 lists the vector layers available, however I would like the 3rd ...
0
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1answer
150 views

Unique Values in validation

How do I ensure the same selection is not made on param[2] and param[3] both of which are populated from the same field using tool validation? import arcpy class ToolValidator(object): """Class ...
2
votes
1answer
277 views

How to Format Description when writing Help for Python script tool?

I try to format the description in script tool but I don't know how it works so i don't manage to add a line break for example. Does it works with HTML tags ? When editing my script the description ...
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1answer
2k views

Radius of Curvature Python/Arc, how access x,y coordinates

I have a polyline in ArcMap 10 and I am able to script the length of the line in Python using this bit of code: #Calculate Radius of Curvature #try: # Import system modules import sys, string, os, ...
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1answer
85 views

Arcgis9.3 Problem with search cursor and update cursor in two different table

I am making a python code for ArcGIS 9.3 : -I have one folder with a lot of shapefile polygon inside - Ech polygon shapefile have a field "Average" and one ID - I have a table with each field ...
3
votes
1answer
887 views

Creating Selection MapTool in PyQgis Custom Application

I'm developing a custom GIS application using PyQgis API. How can I let the user select features on the map using Maptools? I would like to replicate the select feature there in Qgis to make the ...
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1answer
316 views

Python.dll could not be loaded with PyScripter

I'm trying to configure PyScripter with QGIS. I've installed it using OSGeo4W and I'm following instructions to setup a pyscripter.bat file by copying content of qgis.bat file. I have the following ...
3
votes
3answers
310 views

Setup a map server that runs from USB to whatever computer it is connected?

I would like to have a USB that I can bring with me to any computer. That USB should hold a map server, so that the client computer wont need internet and avoid using OSM or Google maps or any other ...
2
votes
1answer
81 views

Labeling only the latest feature

I need to label only the latest feature in a particular feature class. I actually would like to automate it, so that when I will add any new feature to this feature class, the label will automatically ...
0
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1answer
88 views

Problem with SetValue method in ArcGIS 9.3

I am trying to make a python script for ArcGIS 9.3. I have a problem with the SetValue method. I try to use it in a very simple code but it still doesn't work : No error is return but my field is not ...
2
votes
2answers
185 views

Conditional field calculator expression

I need to calculate the PIPEID field to equal the G_KEY_COMP field if PIPEID is null or PIPEID and G_KEY_COMP do not match. I think the first condition of the PIPEID being null is covered by the ...
2
votes
1answer
2k views

How to convert Python (ArcPy) script into tool or toolbox script?

I've written a simple python script that allows me to quickly create a copy of a template Mxd, pointing to different shapefiles. The user specifies the new location, a name for the new mxd, then the ...
3
votes
0answers
633 views

Why does the QgsVectorFileWriter have probelms creating vector files? [closed]

I am using QGis 2.0.1 and have tried to create a new GIS feature file (SQLite, Spatialite, and Shapefile) of a subset of the data. I am then saving a copy of the style of this layer and applying it to ...
1
vote
1answer
593 views

PostGIS Type Modifier Error

I'm trying to work an example from the "PostGIS Cookbook" and I'm getting an error I don't understand. I'm running the example using Postgres.app on a MacBook. Postgres.app is running PostgreSQL ...
0
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1answer
78 views

Retrieve path of running plugin in QGIS

In my plugin's directory I've got some XML settings files that I'd like to parse at a particular point during execution of the plugin. Is there a way to get the absolute path where the plugin's .pyc ...
6
votes
1answer
6k views

Shortest distance from point to line (big dataset)

What is the best method to calculate the distance from the nearest road for a series of address points in QGIS, having a very big dataset? (QGIS 2.0.1, Win XP) I read the answers to previous similar ...
11
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2answers
1k views

Is there a way to refresh imported modules in a ArcGIS Python Toolbox?

When using a python toolbox (.pyt) in ArcMap, I'll typically follow a pattern where the .pyt file itself is simply a wrapper to collect input arguments and define the tools themselves. Supporting ...
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1answer
84 views

Extract information of a raster overlayed on another raster with a lower resolution directly in python

I have two aligned rasters with the same extent, one has a resolution of 5 meters and the other of 125 meters. I would like to place the 5 meter one over the 125 meter one and assign to these smaller ...
0
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1answer
37 views

whereClause syntax for Cost Distance parameter

I am looking to create a sql expression regarding point feature class and selection based on 'Name' field to pass to arcpy.sa.CostDistance() param[0]. similat to: savepath = env.workspace = ...
0
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1answer
670 views

How to generate jVectorMap for United Kingdom (UK)?

I have shapefile for UK , i need to convert this to the jVectorMap Here is my script python ^ converter.py ^ ./shapefile/map.shp ^ ./output/jquery-uk.js ^ --width 400 ^ --where "ISO = ...
2
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0answers
116 views

Compare line with next line in attribute table shapefile

I am making a python code for ArcGis 9.3. The aim is to compare the value of my field "ID_BV" at line l with value of field "ID_BV" at line l+ 1. And depending of the test answer i populate another ...
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0answers
195 views

model to connect points with line and set the digitize direction according to height

I'm trying to develop a tool that connects a point layer (manholes) with lines (waste water pipes) and sets the line direction according to an height attribute acording to gravity(from high to low). ...