A sequence of instructions that repeats either a specified number of times or until a particular condition is met.

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12 views

Creating a for.loop to randomly extract data from a raster stack within shapefile extents

I'm currently comparing a MODIS time series of about 15 years to determine the effects of pasture management practices on the "greeness" of pastures in a water catchment. So far I've been able to ...
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1answer
28 views

fTool in pyqgis: Is it possible?

I am doing a work which I need to sample random points for many layers (classification of land use). Then, I'm trying to do a loop with my several layers and applied a functions of random pointos. I ...
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1answer
23 views

Loop through table, look for word in text field, set boolean true if word exists

I want to create a function that loops through a table and checks if a specific word exists in a text field. If it does, the function should set a Boolean field true. This is what I've come up with. I ...
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1answer
30 views

Add Polygons to SpatialPolygons via loop / iteration using R?

Just out of interest: I'm creating a SpatialPolygon (R with package "sp") with a number of Polygons within. Is there a way to loop this task? I'm doing it manually as follows. The Polygons consist of ...
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2answers
54 views

How can I loop through a list to create rasters and write them to .tif files?

I received 3 .mat files that each contain several daily maps. I need to take them and get them into ArcMap (10.2 if that matters) as a .tif with spatial information. I have already used the R.matlab ...
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2answers
66 views

How to assign a unique ID to groups of items in the attribute table in ArcMap?

Using arcmap's field calculator I need to programatically loop through all of the entries in the field and for each name it gets its own unique id. So names that are the same would get the same ...
2
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1answer
52 views

Using a for loop to execute a query in arcpy

I'm trying to provide the breakdown of fire detection for an area by sorting of confidence levels. The dataset has 12 files (one for each month in a year) with fire records which all have a column ...
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1answer
23 views

Iterative Mean of Means Infinite Loop for calculating H-t Index

I'm trying to create a function that will calculate an Ht-Index for Quantifying the Fractal or Scaling Structure of Geographic Features (but am new to R) which basically just finds nested means of ...
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0answers
60 views

While loop in QGIS modeler

I am looking for a way in QGIS - preferably using the graphical modeler but console scripting will also do - to build a model that iterates through features of a given layer until a condition is met - ...
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2answers
107 views

Using Python to export multiple layers to .pdfs

I have found a solution to the issue below. The problem had to do with coding GetParameterAsText without actually using it as an input in a tool. That was the reason the raster layers wouldn't turn ...
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2answers
60 views

How can i create points per 10 and 100 meters for several lines with ArcPy?

I have 10 lines and i want to generate points per 10 and 100 meters for each one of them. In ArcGis there is the tool construct points(COGO) but is not scriptable. Is there any suggestion? Also i ...
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1answer
83 views

Looping through Layers, Add Layer to MXD, Export Image, Repeat, using ArcPy?

ArcGIS 10.2.2 I am trying to loop through a list of layers in a folder, add each layer to an mxd and export an image of the added layer. I have added arcpy.mapping.RemoveLayer to the script to remove ...
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91 views

How to stop a PyQGIS script that has an infinite loop, using the keyboard?

So i wrote a script that does what i want over and over again using a "while True:" in a certain time interval (every 5 seconds using time.sleep(5)). So far so good BUT when i want to stop it i just ...
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1answer
49 views

Same Sector Created in Mapinfo Help

The PRACH data is saved into a tab and then moved into another tab file "ToUpdate" Select * from PRACH_data where Obj into ToUpdate Fetch First From ToUpdate Do While Not EOT(ToUpdate) circ = ...
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1answer
40 views

Looping for importing and interpolating a lot of LIDAR files?

I'm quite new to Grass Gis and I'm trying to make DEM (digital elevation model) for modelling flooding. I have 170 *.xyz files, which need to be scanned for extents (r.in.xyz -s input=...\filename.xyz ...
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0answers
32 views

JavaScript _.each function not showing correctly [closed]

Can't seem to get this to display the correct way. The correct way would be Day/open/hours. geojson displayed below: hours: { monday: { close: "18:00:00", open: "10:00:00", call: ...
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1answer
122 views

Error in python code for loop using SearchCursor, selectlayerbyattribute, and copyfeatures tools

I am fairly new to python scripting for ArcGIS. I am trying to create maps where each county is selected and then copied into a new layer with only that county's data. Then, I used ApplySymbologyFrom ...
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3answers
271 views

Extract numbers from string field

I am trying to calculate field test2 with only the numeric values from a string field test. The entire script is like: def makestr(test) list=[] for s in test: if s.isdigit(): ...
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64 views

Eliminate in Arcpy

I am attempting to move away from Coverages. One of the tools we have did a great job of eliminating slivers from our datasets based on hard and soft boundaries for elimination rulesets; howver, it is ...
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1answer
41 views

Order/Sorting of Iterate Field Values (ModelBuilder)

I am using Iterate Field Values to Iterate my Model through a list of Strings (DBF-File). However, the Field Values-Iterator will always sort my Field by alphabet (ascending). It does not matter how ...
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1answer
86 views

For loops + boxplot for raster

I have several Rasterstacks (b1_mask, b2_mask,...) of several layers representing only a determined pixel-intensity range. (So point "A" in some layers is "NA" - in others a "value" of that certain ...
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1answer
43 views

How to fix this “Sorry <1> is not a valid option” in GRASS-Ubuntu using r.water.outlet?

I am working with this .sh code (a while loop, extracted from: http://www.surfaces.co.il/) to create watersheds from drainage raster and outlet point of every watershed, but I obtain this error: ...
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0answers
58 views

Looping a location-allocation problem in ArcMap's Model Builder

I have developed the model below in which I iterate through a series of values for a variable in the Location-Allocation type of problem. The variable is the number of facilities to solve. The model ...
2
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0answers
53 views

GRASS 6.4.4 vector command in crashes QGIS 2.4 (g.gisenv.exe has stopped working)

I am running Windows 8.1 64 bit, and have QGIS 2.4 and 2.6 installed. When I try to use a GRASS 6.4.4 vector command (specifically v.clean), I receive an error message in an endless loop, and the only ...
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2answers
114 views

Use row as input to other processes in python

I am new to python and need help. Looked for my answer but don't know if I am even using the correct terminology. I have a model in which I iterated through rows and performed a set of processes on ...
2
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3answers
77 views

Arcpy: Processing multiple files subsequently

I have an indexed dictionary containing files and want to "mosaic" (arcpy.MosaicToNewRaster_management) all files with the same index. The number of files per index range from 1 to about 30. ...
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1answer
116 views

GRASS scripting for producing multi-band raster

I am trying to loop the r.sun function within a Python script. Anyway, I seem not to understand how I can stack the raster maps each loop would produce into a single multi-band raster (preferably in ...
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1answer
332 views

ExecuteError: Failed to execute. Parameters are not valid. ERROR 000732: Layer Name or Table View: Dataset L does not exist

Hi I am trying to create a loop so that each layer is produced in its own map. This is my code: import arcpy path = "C:\Users\Et\Documents\ArcGIS\Default.gdb" mxd=arcpy.mapping.MapDocument(path ...
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2answers
53 views

Con function loop doesn't calculate for all the fifty rasters in a list

I have been trying this for hours and I know it should be easy but I can't make it work yet. I have a list of 50 rasters that I need to change the NoData to "0" values. I have the right arcpy ...
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0answers
35 views

label based on related features

Esri's telecom data model has 2 geometric networks, one for infrastructure (manholes and conduits) and one for fiber cables. fiber cables are easily related to a section of conduit based on existing ...
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1answer
97 views

Using query in a while loop causing android application to freeze

I am having some troubles with the while loop + query. What I'm trying to do is track the user location (using onlocationChanged) and keep querying a FeatureLayer until the query returns a result and ...
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2answers
117 views

Problem with Bash loop in GRASS GIS

I'm new to GRASS GIS and programming and I'm running into a lot of what I imagine are beginners problems and something similar to this has been asked before, but not In a way that I understand. I'm ...
2
votes
1answer
92 views

Exporting layout elements and constants to Python script?

Is it possible to export the elements and constants used in a layout to a Python script? Something similar to creating a model and exporting it to Python but instead of being a model, it's a layout? ...
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1answer
213 views

Create a fishnet in a 'for' loop with Arcpy

When running the following script, I get the error saying that I need a value for “origin_coord” and for “y_axis_coord”. So is it not enough to define a template dataset? But how can I fill the ...
2
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2answers
108 views

Batch Conditional Test - For Loop with a Group of Rasters

Edit: Question was answered. Please scroll to see fixed script. Thank you everyone who helped! How do I ask a “for loop” to operate on groups of three files folder (e.x. files A, B, C), then files ...
2
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1answer
184 views

How to add buttons to QT ui for qgis feature forms to loop through attributes?

I'm looking for a bit of guidance. I'm happy creating a standard feature form using QT designer (as excellently documented here) for QGIS but I was wondering how you add a forward and back button to ...
2
votes
2answers
85 views

Reclassify a rasterList and sum the reclassified value from each Pixel

I'm trying to write a script in arcpy which reclassified a List of Rasters. This rasters are made by another tool before so there is already a loop. Actually I get the error 000582 and before this ...
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2answers
73 views

Create a table with open() in a loop using the SearchCursor and InsertCursor

I like to create a table with open() in a loop using the SearchCursor and InsertCursor, but I don't know how. Before I used a few geoprocessing tools to get a field for percent. The Attributtable of ...
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84 views

Python + GME (Spatial Ecology) + Subprocess.call

I'm trying to run the following code to use GME commands in Python. import arcpy,os,subprocess from arcpy import env env.workspace=r"D:\Users\myname\Desktop\aviso" count=0 for raster in (f for f in ...
2
votes
3answers
712 views

Loop with arcpy.ListFiles

I'm super new on here and have also not much experience with Python but I really like to learn to work with this language. I'm tying to write a script for this: I think I need a for loop instead ...
3
votes
1answer
252 views

How to do loops on raster cells with python console in QGIS?

I'm new here and beginner with python. I'm looking for a solution to my problem for some hours but now you are my last chance... I'm using the python (2.7.5) console in QGIS (2.4.0). Is there a ...
3
votes
3answers
530 views

Loop in ModelBuilder for compositing bands of multiple Images

I'm attempting to automate the "Composite Bands" tool somehow in ModelBuilder, but haven't been able to figure out an effective method. I have landsat 7 data that is separated into folders and each ...
0
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1answer
492 views

Getting error 'exceptions.NameError' in Python script?

I'm getting <type 'exceptions.NameError'>: name 'B' is not defined when I run this script. Why is my 'B' not defined and is it a syntax error? For clarification, I am trying to get the code to ...
2
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1answer
99 views

forLoop & joinField & different names

I have a folder with an output (shapefiles) from an iteration. On this output, I want to perform a join between two attributetables. So far so good. Here comes the tricky part. There are different ...
2
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2answers
96 views

Call field from zip() into Field Calculator expression ArcGIS

I've been trying to find a way to call in field names from a zip(). Basically I have 12 fields called "Flw_days1", "Flw_days2" etc and corresponding "Depth" fields that need to be calculated using the ...
0
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1answer
48 views

Interaction with two variables as parameters, saving the raster properties output into a table (.dbf)

The draft of the model below TASK: I need to calculate the percentage of river channel that is covered with shadow in each timestep RESOURCS: I have values for azimuth and elevation of the sun ...
0
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1answer
104 views

excluding NaN records from FOR loop?

I am trying to create an array of Z and M values for vertices from a polyline (Z and M enabled) feature class. Some of the vertices do no have M values/geometry and I wish to exclude them from the ...
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0answers
68 views

How can I define coordinate system of feature class when overlaying with coordinate zone shapes in python?

I have generated bounding boxes for CAD drawings that do not have defined coordinate system files. I know that each drawing could be in one of 6 different systems that do not overlap. My idea was to ...
0
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1answer
58 views

Creating a loop for Lines data (spatial data)

I am trying to build a lines shapefile with the contour lines from the 20 meters isobath from along the East African coast. This contour line of 20 meters has different segments and I have this ...
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1answer
67 views

Splitting the job on Arcpy SearchCursor

I'm running a for loop with a cursor to disaggregate a large feature class into many smaller ones (of one polygon each). ArcMap crashes after about 1100 iterations, and I am trying to break the job ...