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

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2
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141 views

Python script to create a point on a line with attribute data

I have a line feature class with 2 lines (Engineering and Continuous Station series) co-incident on each other. I have created a toolbar(ArcGIS Desktop add-in 10.1) with 3 tools on it, add control ...
2
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0answers
317 views

Multiple ring buffer on point-shape error

I need to calculate multiple ring-buffers, but every time I try, arcgis produces a failure: Executing (Multiple Ring Buffer): MultipleRingBuffer Y:\GIS\RDY\clip\sn_clip.shp ...
2
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0answers
260 views

Running a new iteration for each column of a dataset in ArcGIS

I'm pretty new to Modelbuilding, having just been turned onto it about a week ago on here. So my problem is, I currently have a dataset of habitats that change through time (from Immature to Mature, ...
2
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0answers
68 views

Arcpy: Counting number of segments where altitude rises or decreases based on DEM?

I have a DEM of Sudety mountains and linear .shp with several hiking paths. I'm trying solve one problem: How to make a script based on input DEM and input line shapes that would count number of ...
2
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0answers
172 views

problem in read_shp() to generate a networkx.DiGraph from point and line shapefiles

I tried to use the Python module networkx and specifically the read-shp () to ensure the transformation of a graph to a file sharpe but I always find this error noting that this is the first time I ...
2
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0answers
173 views

projection discrepancy with gdal (1.9) and proj4

I boiled the problem down to that python example: import sys try: from osgeo import gdal from osgeo import osr except: import gdal import osr if __name__ == '__main__': version_num = ...
2
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0answers
169 views

Localized Linear Histogram Match using python

I would like to use the local linear histogram match for filling the missing pixels of a Landsat 7 image with another older image (SLC Gap-Filled Products). Do you have any idea how can I do it by ...
2
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0answers
73 views

Removing FID as an option from ArcGIS Tool Validation Parameters

I am currently building a script tool which requires the user to select a sorting field from a list (built using a dependency on the featureclass). This Element is working fine, but I would like to ...
2
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0answers
56 views

Is there a way to distinguish between digitized and pasted features?

Is there a way to tell if an added feature in QGIS is in fact a newly digitized one or a pasted feature? I think QGIS is treating both cases in the same way, emitting the same signal: ...
2
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0answers
103 views

Convert geojson labels MBR to MapInfo text object

Im using Dymo (https://github.com/migurski/Dymo/) to generate automatic point labels placement. The output of Dymo is a geojson containing MBRs of the positioned labels with the names of the labels in ...
2
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0answers
337 views

How to access mysql data from python built-in console?

I'm writing a QGIS Plugin, and somewhere I want to present data from a MySQL database. It's simple data(strings,etc), not Geospatial, or vector data. I'm familiar with querying databases from python ...
2
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0answers
59 views

How to call a method when self.iface.actionSelectRectangle().trigger() is released?

In my QGIS python plugin I use "self.iface.actionSelectRectangle().trigger()" to select features. I also have a button which changes the attributes of the selected features. Is there a way instead ...
2
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0answers
166 views

qgis and embedded ajax (bing map)

I need to load in a docked QWebView this html: < html > < body > < iframe width="100%" height="499" frameborder="0" scrolling="no" marginheight="0" marginwidth="0" ...
2
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0answers
131 views

How can I draw an ellipse filling the dataframe with ArcPy?

I need to modify one of my template scripts to draw a circle from the centre of the (inset) data frame to the edge of the data frame. This will then be used to clip the data frame to shape. I'm using ...
2
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0answers
59 views

How do I make a path cross the most possible classes in a raster?

I want to create a function and possibly use Arcmap tools to create something similar to Cost Path. Instead of just choosing the LCP, it must cross through the most different integers. Let's say I ...
2
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0answers
145 views

Why would an ArcGIS 10 Python custom tool fail without throwing a “failed to execute” or “completed script” message at the end?

I have written a custom tool in Python for ArcGIS that converts in batch SHP files to GML files. It processes one file at a time in a folder, file, or ZIP file and then moves on to the next. If the ...
2
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0answers
428 views

Add CAD Drawing Dataset into ArcMap using Python

I am trying to add an CAD Drawing Dataset into ArcMap using Python. Question is how to add a Auto-CAD .dwg file to ArcMap using Python Normally comes in as CAD file within a Group layer with: ...
2
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0answers
144 views

Setting border-style to 'no pen' using QgsGraduatedSymbolRendererV2

I am developing a QGIS plugin that, after a series of inputs, will produce a thematic map using the QgsGraduatedSymbolRendererV2. Because the polygon are very small, the boarders make it such that ...
2
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0answers
156 views

Are there Plugin Compatibility Issues between QGIS 1.6.0 and 1.7.4?

I've been working on a QGIS plugin on Quantum GIS 1.6.0 Copiapo with Python 2.5 that calculates additional values for eachf feature of a vector layer and adds them to the .dbf. We've just upgraded to ...
2
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0answers
219 views

Recalculate Quantile Breakpoints in CalculateField_management loop?

I have a program that iteratively replaces a temp field where I choose a certain symbology (color ramp and quantile color break methodology) with a few other fields from a join. The program works in ...
2
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0answers
58 views

Tiled image transforming to new profile

i have a set of tile which was tiled profile of mercator and proper to tms scheme mechanism. unfortunately i dont have any tif or georeference table or anything for this. all was tiled with mercator ...
2
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0answers
160 views

Is there any way to suppress the calculate field dialog box in arcpy script?

I've got a python script that I inherited. The python script takes input from a variety of feature classes and tables and spit it out to a single table. When I run this script via a scheduling ...
2
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0answers
135 views

How to change the QGIS help dialog?

I am working with python plugins for QGIS. I am done with my one of my .py file using python 2.5 and pyqt4. It is just help file for QGIS, which i changed. I wanted to incorporate the same in QGIS. I ...
2
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0answers
573 views

Perfectly running python script gives error when run from web.py

I have the following python script which runs perfectly if run separately: import arcpy val = arcpy.GetCellValue_management("D:\dem-merged\lidar_wsg84", "-95.090174910630012 29.973962146120652", ...
2
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0answers
577 views

Spatial Analyst Cell Statistics seems to give the wrong answer in ArcGIS 10.0

I have a script that calculates standard deviation for a list of grids using the Cell Statistics function in Spatial Analyst for ArcGIS 10.0 The syntax is this: stdevGrid = ...
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0answers
12 views

Python 2.6 Module for GDAL 1.9.2, ImportError

I work on an internal network(IE I cant get the latest 1.11 stuff) and have GDAL 1.9.2 setup on a Red Hat Linux Enterprise Server 6. My linux box has python 2.6.6 however the python binding I received ...
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0answers
23 views

Reprojecting and Clipping in one script using Python Subprocess module and GDAL

I am trying to reproject a .tif file then clip it to the boundaries of a shapefile using GDAL Warp. I want to do this in a single script, and have successfully used the Python subprocess module to ...
1
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0answers
18 views

How to freeze basemap using cx_freeze

I am working on script and I´d like to freeze it for use in computers who haven´t got python installed- The script is running fine but when I freeze it using cx_freeze an error appears. at the end ...
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0answers
19 views

Error message retrieval in grass.read_command

I am writing a script in python and would like to get the error messages of the function grass.read_command for seeing why it is not working. I found a webpage ...
1
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0answers
34 views

Clip Management won't work outside of ArcMap/Catalog

Okay so I have a short script that works great when copied into the python window in ArcMap or ArcCatalog, but refuses to work in an IDE for whatever reason. The error that is thrown is: Start Time: ...
1
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0answers
18 views

PyQGIS add WMS layer with CQL_FILTER

Dear PyQgis developers! I'd like to add a wms layer through my QGIS plugin with custom CQL_FILTER parameters. My problem is, that the CQL_FILTER parameters are not passed to the GeoServer (I can see ...
1
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0answers
22 views

Adding features in the layer with reference to another layer

I have built a tool for creating line in the exact center of two selected lines through this code: import math def mainCl(): ftr_geom = [] select = iface.activeLayer().selectedFeatures() ...
1
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0answers
33 views

Esri Python Toolbox(pyt) corruption in ArcToolbox.dat

Symptoms: Open ArcCatalog and all tools within Python Toolbox(pyt) have a red-x error next to them claiming that "Arcpy module has no attribute Parameter" Close ArcCatalog Delete ArcToolbox.dat file ...
1
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0answers
27 views

Error writing defaultdict values to feature class rows

I originally posted building dictionary from feature class field values, how can I ensure there are no duplicate values per key. The goal is to update another field with all the values per key, which ...
1
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0answers
35 views

How to change color ramp in graduated classification with standard deviation using pyqgis

I'm using graduated clasiffication with standard deviation to style my shapefile (see code below). But I need to use different color ramp for classes below mean (-1std, -2std etc.).I'm thinking of ...
1
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0answers
15 views

Print Custom Feature Form using PyQGIS

I recently asked a question and accepted the answer, as it was a good guide on accessing the print composer using python. However, I am still looking for a way to print the custom feature form. Does ...
1
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0answers
37 views

midpoint of segments in QGIS determination

Gene thanks for your note on the problem yesterday ... This is a follow up to a question I posed before (How to find the middle point of a line in QGIS - Where to place input file name). Errors coming ...
1
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0answers
50 views

Is there a python function in QGIS to detect if the output file is saved to the hard disk?

I'm currently using QGIS 2.4 and writing some custom scripts on it. A proper script not only accomplishes its function, but also accepts user defined parameters and checks for possibilities of errors. ...
1
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0answers
39 views

QGIS Add WMS layer with python

I'm developing a stand alone python script using QGIS 2.2.0 libraries. I want to add a WMS base layer to my map, and I follow the instructions reported by the documentation: urlWithParams = ...
1
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0answers
34 views

User input and passing variables with ModelBuilder

I have created three modelbuilder tools that must be run in sequence. After running each tool, the user must examine several shapefiles and potentially change the input parameters of the next tool. ...
1
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0answers
23 views

Stereo-pair Image Registration

Is there a simple command line or python based way to visually register a pair of overlapping stereo images and clip the non-overlapping areas out? These images do not have spatial information ...
1
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0answers
18 views

PyQGIS: Properly trigger actionPan() tool when feature is added

I wrote a plugin which creates a custom map tool that adds features. I would like to cleanly connect to the pan tool after a feature is added. I've done it in the following way and it works, but I get ...
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0answers
76 views

Cumulative field calculation using Python in ArcGIS for Desktop?

I am using the following Python code to sum cumulatively but I need the summation to take place while the other field is equal to 1 and then again start the summation when it's equal to 2. I need the ...
1
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0answers
30 views

Finding areas with high POINT density from PostGIS table using Python

I have a PostGIS table with thousands of POINT objects and I want to find areas that have a high density of points. I have the DBSCAN clustering algorithm implemented in Python which does exactly ...
1
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0answers
32 views

QGIS processing framework SAGA NaturalNeighbor in external Python Script - No Output

I want to build a little script, which generates a NaturalNeighbor grid based on a point Shapefile. The script runs within my PyDev environment without any error messages, but no outputfile is ...
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0answers
23 views

Setting up ArcPad applet (Python) that calls arcgisscripting?

I've been asked to support a legacy script that was "made" (read: found) by a former coworker. My python skills are pretty basic, so I went right to installing the applet like I would for a VBS ...
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0answers
23 views

cadtool and spline plugins not working

Am trying to edit a line shapefile using a spline tool in QGIS 2.4.0 .Its drawing but the ok button is inactive. what could be the problem? Generally am trying to create a curved line.
1
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0answers
17 views

Python Script calling custom model failing during model execution

I have a python script that calls a model I built in model builder. If I run the model by itself it runs perfectly. If I call the model in the python script, the model errors in various locations. ...
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0answers
29 views

Orthographic projection in Python Basemap

I'm trying to plot a GeoTIFF in Python using Basemap. I can do so correctly with cyl projection like this: m = Basemap(projection='cyl', llcrnrlat=LL[1], urcrnrlat=UR[1], ...
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0answers
32 views

How to write in only a file .csv (or .txt) the values contained in several rasters?

I am an beginner in Python programming but I would like to write in only a file .csv (or .txt) the values contained in several rasters. For example, I built several rasters by using a loop. The ...