Geographic Information Systems

Questions tagged [iteration]

Ask Question

The tag has no usage guidance.

120 questions
Newest
Active
Bountied
Unanswered
Filter by
Sorted by
Tagged with
1
vote
0answers
16 views

Iterate raster data error 00964

I'm building a model in arcmap 10.7 model builder to determine zonal statistics for multiple raster in a geodatabase. The model works, but only when i run it through model builder. When I try to run ...
0
votes
1answer
37 views

Iterate through table to do geometric calculation

I've got two tables: tableA holds the objects with it's geometry tableB holds holds pairs of two objects (ids, each in a separate column) from table1 Now I want to calculate the concaveHull for ...
0
votes
0answers
23 views

Iteration between different polygons in one layer

I am trying to create a code that will calculte the mean NDVI value for each polygon,the standard deviation , then std/2 and then will classify the pixels inside each polygon according to the next ...
1
vote
0answers
35 views

To Iterate through all layers and all attributes for each layer

I am working in the Python console in QGIS 3.10. I want to iterate through all layers and for each layer iterate through all attributes and set them all to 'Hidden'. I want to do this in ...
2
votes
0answers
25 views

Model Builder ArcGIS - Export topology errors (Iteration Tool)

I was wondering if there’s any option to iterate export topology errors in ArcGIS model builder. My GDB Topology errors has all topologies within the same Topology dataset but model builder seems not ...
0
votes
1answer
51 views

Collecting and merging Service Analysis Line features using ArcGIS Pro ModelBuilder

I try to collect and merge Service Analysis Line features after iteration. I name my analysis layers with the iteration values, but it doesn't help. The output feature datasets of the analysis named ...
0
votes
1answer
25 views

Export dimensions of NetCDF as individual rasters in ArcMap

I have a NetCDF file in ArcMap that I created using the Make NetCDF Raster Layer tool. The band dimension of interest is the variable "time", which has 316 grids. I need each individual grid as its ...
1
vote
1answer
27 views

Using submodeld in ArcGIS ModelBuilder

I have three geodatabases (176 files each) with raster data. let's call the first one as G, the second one as D and the third one as S. Now I want to perform a raster calculation so that the G1-D1-S1.....
2
votes
2answers
70 views

PyQgis difference iteration

I use Qgis. I have two layers that are two circles with the same center. One larger and one smaller. I want to do the difference between the two circles BUT only if they have the same "objectid" (the ...
0
votes
2answers
39 views

Replacing all <Null> values in the attribute tables of all feature classes in a FGDB with the blank (empty) ones

I need to iterate through a file GDB feature classes to replace values found in all the columns of attribute tables with the blank ones (empty''). Here is my code, that doesn't work. Truth be told I'...
9
votes
2answers
239 views

Using RECURSIVE in Virtual Layer

Preface For a while, I was wondering about applying the looping/iterable functions in QGIS's Virtual Layer. There were several cases when the application of a loop would be beneficial and ...
1
vote
2answers
58 views

ArcPy Iterative Select by Location

I have a very large dataset with line features that represent a utility, and lines that come off of those utility lines showing connections to buildings. (example shown below - utility line in black ...
1
vote
0answers
37 views

Multiplying two iterating rasters in ModelBuilder or Python?

I have several Landsat scenes that I wish to remove clouds from. I can do this by multiplying the Landsat layers by their associated cloud layers in the Raster Calculator. How can I set up iterations ...
1
vote
0answers
33 views

Loop in ModelBuilder in a specific situation

I would like to make a loop in the next model base on a expression, this expression received a code with consecutive numbers in a reference layer call "sector", to summarize, for each "code" do a "...
0
votes
0answers
9 views

Multi-Geodatabase Iteration and Kriging

I have a huge number of databases in a single folder that have point data with z-values. I need to go through and pull out the point features from each geodatabase and create DEMs for each. Through ...
2
votes
1answer
57 views

Iterate a clip over multiple feature classes using Model Builder or ArcPy

I have multiple feature classes (buildings, airport, land, roads etc) that I would like to clip using a Local Authority boundary. I am trying to create a process in model builder or Arcpy that will ...
0
votes
1answer
47 views

Using ArcGIS Field Calculator?

I have a large shapefile with 2,5 million points and I would like to create a new field in the attribute table that groups the features into groups of 65000 features. In other words: Select the first ...
1
vote
1answer
88 views

Google Earth Engine -Iterated image of NDWI

I computed the NDWI of the whole image collection and I expect to output an image that shows water body whenever it has been flooded , even once , throughout the filtered date. Somehow the output ...
1
vote
1answer
32 views

Iterating through 2 different Geodatabases at same time using ArcPy?

I have 2 gdb's; one that contains a polygon feature class of census blocks(cb), and one that contains centroids that may lie within those census blocks. They are organized by state. Ex: FL_cb = ...
1
vote
0answers
139 views

Extract time series from ImageCollection for multiple points - Google Earth Engine

I have the Sentinel 2 (COPERNICUS/S2) ImageCollection and a FeatureCollection of points. I want to extract a time series for each of the points from the band information in the ImageCollection. So ...
4
votes
1answer
111 views

Selecting neighbours in an iteration using Select by Location

In the 'Select by location' tool, there is an option for Selected features only. When it's ticked, the resulting code for selecting touching polygons of a selected feature looks something like this: ...
0
votes
1answer
30 views

Iteration of AddJoin to join CSV files and a geodatabase feature class file

I have a geodatabase feature class file and I want to join the feature class file to CSV files respectively. For example: Join the geodatabase feature class and CSV 1 => save as CSV 1 in gdb. ...
0
votes
1answer
63 views

Filtering area through defined time period using Google Earth Engine?

I tried the following code in the Google Earth Engine through the various countries which have different dry season. But I cannot understand how to iterate the code. can anyone generate iteration ...
0
votes
1answer
42 views

In ArcGIS 10.6, how do I build a model to intersect iteratively?

This is my first time building a model from scratch, so let me know if I've omitted anything in describing this question. I have a geodatabase that contains shapefiles (polygons) of watersheds. I ...
6
votes
1answer
1k views

Iterating features and buffering using GeoPandas?

I have a shapefile with many large polygons and would like to process each polygon individually because spatial operations on the entire dataset are too big for memory. For instance, iterate shapefile,...
0
votes
1answer
111 views

Print elevation of different coordinates from .hgt file [closed]

I am trying iterate through the data(elevation) from .hgt file. I have attached the codes which i used to get the elevation from the file. from gmalthgtparser import HgtParser hgt_file='N09E076....
1
vote
0answers
24 views

Iteration for “Selection by Location” in ArcGIS modelBuilder

I have a featuredataset of 50 Features which are supposed to have intersection with some lines and their Buffers which are in different feature classes. I have created a separate GDB for the Buffers ...
1
vote
1answer
35 views

Sampling from all the images in a collection and combining them into one FeatureCollection

I'm trying to collect a set of sample points from all the images in a collection. However instead of outputting a Feature Collection that consists of a group of Features with the training data as ...
0
votes
0answers
19 views

Joining xls file with shapefile attribute through ModelBuilder?

I have folder contains xls files and I need to make join for each file with a shapefile attribute using ModelBuilder. My trial is as follows: and obtained "Precondition" option only. How can I ...
0
votes
0answers
48 views

Performing iterative Mosaic in ArcPy?

I'm attempting to complete a batch mosaic operation in ArcMap 10.4.1 Python window. I need to run the Mosaic tool about 80 times for sets of three rasters. Basically I want the second and third raster ...
1
vote
1answer
119 views

Getting for loop which stops after first one to iterate properly?

I originally asked UpdateCursor can't acquire lock, but can acquire lock in TestSchemaLock and got some help about why my code wasn't acquiring a lock. My new problem is that my code isn't fully ...
0
votes
1answer
125 views

How can I add a featureCollection to another one to export into one sigle .csv file?

Sorry if this is an silly question, as I am starting to work with GEE. I am iterating (mapping) over a Sentinel-2 image collection, using different coordinates and dates in each step. My goal is to ...
0
votes
1answer
28 views

Building model to select values at point from folder of several raster layers?

I am using ModelBuilder to interpolate values with inverse distance weighting, iterated through several rows, resulting in many raster datasets - one raster layer per row. I have this and all the ...
2
votes
1answer
277 views

Using Iterate Feature Selection in ModelBuilder causes entire model to iterate?

I'm creating a fishnet on ModelBuilder, the extent of which is based on an Input raster. The output of "Create Fishnet" is gone through an Intersect tool, and then is fed into an Iterate Feature ...
1
vote
0answers
71 views

Select Feature Based on Iterate Row Value in ModelBuilder

I have a table showing commuting trips from home to work. home_id represents home and work_id represents work. Now I want to step through the trips table using Iterate Row Selection in ModelBuilder, ...
1
vote
0answers
28 views

Extracting field values to Excel by iterating in ArcGIS ModelBuilder?

I have a database with a lot of feature classes containing shapefiles. What I want to do is to use ModelBuilder in order to iterate through all the feature classes and for each feature class go ...
0
votes
1answer
208 views

Iterating folder of shapefiles using ArcPy and exporting mxd to PDF

I'm new to Python and just created a hard coded script for the process I want, and it works. Right now it calls on the one of three shapefile I have in this map document. I want it to do the same ...
0
votes
1answer
424 views

Using %Name% variable dynamically with selection tool in ArcGIS ModelBuilder?

In ArcGIS ModelBuilder is it possible to use a %Name% field value from iterated features in a query and, if so, what syntax should I use?
1
vote
1answer
184 views

RuntimeError: General function failure when running arcpy.da.SearchCursor

I have a script that was previously working but just started throwing an error out of the blue. Here is the traceback: Traceback (most recent call last): File "<ipython-input-68-be384b1c4968>...
3
votes
1answer
228 views

File naming iteration QGIS modeler

I am attempting my first use of the modeler from the Graphical Modeler from the Processing menu in QGIS. I made a simple model for cliping species data by sanctuary.It has two Vector Inputs, uses some ...
0
votes
1answer
118 views

Running iteration at end of another in ModelBuilder?

I would like to run two iterations. One assigning the respective attributes from the polygon file containing the cols and rows. And after that iteration another iteration that selects all of those ...
-1
votes
2answers
95 views

How to iterate through date and time text file, line by line?

I am building a model on ArcGIS and I am now trying to iterate through a text file that contains in each line date and time information. I tried to do that on Model Builder, only I used the get field ...
1
vote
2answers
168 views

How to extract multiple polygons from a layer that overlap with a point?

I would like to get attributes of polygons that overlap with a point. This is to see on which street the lanterns are located, so if they are on a crossing I want to get both streets. Right now I can ...
0
votes
0answers
16 views

Intersect five different points of same layer

In ArcGis Desktop I have the following problem: I have a layer of sites, let them be hotels, for instance, and I want to find each place, where there are less than five hotels within a radius of 30 km....
1
vote
1answer
223 views

How to iterate through a list of polygons' centroids in QGIS

I'm the new one. I try to calculate the azimuth between a row of polygonsheets to print the number of the last and the next sheet inside the sheet in direction of the last and the next sheet. This ...
1
vote
0answers
945 views

Creating FeatureCollection from imported assets in Google Earth Engine? [closed]

I have imported several shapefiles as a Fusion Table in Google EE. My goal is to calculate the amount of forest loss (from Hansen et al) and the MODIS VCF (percentage tree cover) for each shapefile, ...
4
votes
4answers
230 views

Problems with for iteration in arcpy

I want to fill a new field in a shapefile using arcpy. I have differents values so I am using for iterator to run all rows. But when I run the code all rows are filling with the latest row value. The ...
0
votes
0answers
187 views

Interpolate Multiple Data With Kriging In ModelBuilder?

I am having problems building a model for running interpolation on multiple data using the Kriging method. I have followed these steps: Convert multiple data to geodatabase file Used iteration on ...
0
votes
0answers
37 views

Adding median values of several rasters (geotiff) to each fishnet polygon (200x200metres fishnet) using ArcGIS ModelBuilder?

I have a 200x200metres fishnet of my study area, with a few attributes in it, like land use, percentage of each landuse class. Now I need to add the median value of more than 10 rasters to the ...
0
votes
1answer
51 views

Trying to build a model to get all layers(same name, different folders and different geodatabase) into one

I have over 3000 folders, each folders have a geodatabase and each geodatabase consist of a layer name called "lot". I want to merge the all the "lot" layers into one layer shapefile, my gis ...

1 2 3