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7
votes
2answers
2k views

Using multiple wildcard parameters with arcpy.ListFeatureClasses

I know there has to be a way to do this but I'm having trouble figuring out how to do so. I would like to create a list of feature classes to perform operations on however, I want to have the list ...
6
votes
2answers
480 views

How can I turn a python list into a table?

I am trying to create a table of coded values so each textual description has a numerical attribute. The order of numbers is not important - they just need to be unique. What I have so far is a ...
5
votes
1answer
2k views

How to check if feature class or table contains field with specific name before adding it?

Im trying to write a script that finds out if the shapefile has a specific field and if not to add the field. I get it to show me the field, but the loop goes through each field, so it would create a ...
5
votes
3answers
3k views

Table to table script using Excel sheets (not workbooks) arcpy

So what I'm trying to do is to create feature classes from the sheets in an Excel table. I can get it to work if I save each excel sheet as its own workbook, however this isn't really what I want. I ...
4
votes
1answer
1k views

How can I rename multiple feature classes (each different name) using Python?

I have a geodatabase including (cnty06,cnty07,cnty08,cnty09...) that I'd like to rename to (c06,c07,c08,c09...). I can use the ModelBuilder (or script from ModelBuilder) to complete this task. Is ...
4
votes
1answer
3k views

How to List field name aliases in one shapefile/layer using ArcPy?

I want to use arcpy/python to print out a list of all the field name aliases for a specified shapefile. So far I have been able to hack a script I found to list all the field name aliases associated ...
4
votes
3answers
3k views

How to extract data using arcpy.da.SearchCursor

I have a shapefile of point features showing fire locations in a given year. One of the fields is named "YYYYMMDD" and indicates the corresponding date that that fire happened. In Python, I am trying ...
3
votes
2answers
390 views

Process every 100 records in list

An arcpy merge process is failing due to the size of the datasets and I need to just merge every 100 tiles before it goes on to the next 100 tiles. I wrote the following snippet but it is just ...
3
votes
1answer
116 views

Append List not working

Trying to create a list of well counts. In the code below, wellCntList only contains the current county count and not a list of ALL the counts. Sure I'm missing something simple. for cname in ...
3
votes
1answer
422 views

Creating multiple Feature Datasets from table/list using ArcPy?

How to Create multiple Feature Datasets from a table/list. I can create a single feature dataset in a geodatabase with this Python code. import arcpy from arcpy import env env.workspace = ...
3
votes
2answers
2k views

Where is list of Geographic Transformations in ArcGIS, and their areas of applicability?

I have some data in Provisional South American Datum 1956, and I need to project it to Web Mercator with WGS84 as the datum. When I use the project tool in ArcGIS desktop, it requires a Geographic ...
3
votes
1answer
48 views

How to slice a list based on row values? [closed]

I'm working with python 2.7 (quite a beginner). I have a list, and I have a feature class with : A = a field that contains values that I would like to use as the start of the slicing B= a field that ...
3
votes
1answer
151 views

Why does arcpy.ListFeatureClasses() take so incredibly long?

I'm having an issue where calling arcpy.ListFeatureClasses() in a workspace with 400 shapefiles takes a very long time (more than 10 minutes). Using the os module to achieve the same effect takes ...
3
votes
1answer
157 views

How do I update common fields in multiple feature classes with ArcPy?

I have a piece of code that I can use to update several fields in a specific feature class. I would like to use this code to update all of the feature classes in the data set. The data set would ...
3
votes
1answer
3k views

Adding bullet points to text boxes

I need to be able to add bullet points to a text box so I can display a list on my map. The work-around that I tried was to format the font differently and use a Wingdings character that looks like a ...
3
votes
2answers
791 views

finding the index of a field with its name using arcpy

I wan to extract the index of a field with its name using arcpy. it seems what I have written is so dumb. is there any simpler method with out using for-loop. import arcpy fieldList = ...
2
votes
1answer
76 views

Calculate Row if Row Value Equals Value in List

I have a folder of photos named with a building ID that corresponds to a building ID in a building footprints feature class. Not all rows in the footprints feature class have a corresponding photo. ...
2
votes
2answers
104 views

Get feature from list

I've done this: while (feature != null) { if ((feature.get_Value(feature.Fields.FindField("NAME")) != null) && ...
2
votes
1answer
622 views

ListRasters not recognizing raster files in python

I have 2 rasters in my workspace, one in TIFF Format and the other in GRID format: "C:\ExampleFolder" When I use the python script: import arcpy >>> ...
2
votes
1answer
626 views

Convert a List to a file list to use in an arcpy tool

I just can't figure out how to feed a list of files into an arcpy tool... I have List_tif.append(os.getcwd()+"\\Stage1\\"+name+"\\GeoTif\\"+name+"_"+str(ddp.pageRow.PageName) + ".tif;") That ...
2
votes
2answers
50 views

Creating a list using an attribute query with arcpy.da.SearchCursor

I have a shapefile of a river network containing the following fields: toJunction, fromJunction, Int_DAM (which indicates free-flowing status) and Strahler. I'm trying to create a list of the rows ...
2
votes
1answer
370 views

QGIS 2.14 GRASS geoalgorithms don't work?

I instaled qgis 2.14 and grass geoalgorithms dont work. Only 160 geoalgorithms and should be 168. MsBox: Missing dependensy, It seems that GRASS is not correctly installed and configured in your ...
2
votes
1answer
81 views

Determine the number of fields of a certain field type there are in an input feature class

So I am wondering how to get the number of field types "String" by creating a custom function? Can anybody point me in the right direction? I have a shapefile named streets and there are 73 field ...
2
votes
2answers
270 views

How to make a list of ESRI GRID rasters in Python

Tipically, ESRI GRIDS are not defined by a file extension like for the .tif files, but they are stored in a info folder plus an extra folder corresponding to the name of the raster. Arcpy allows to ...
2
votes
1answer
233 views

Error message trying to merge Shapefiles in Python

I try to merge all Shapefiles from one folder together into one, using this: shapeList = arcpy.ListFeatureClasses() print shapeList for fc in shapeList: if fc == "*domain*": ...
2
votes
1answer
129 views

What is the purpose of arcpy.Array()?

I am wondering what the purpose of arcpy.Array() is. It seems an intermediate step between creating a list of objects and performing some sort of conversion, for example, such as in the sample code ...
1
vote
2answers
208 views

Creating tool in Python toolbox to export field list to Excel?

I am creating my first tool in a Python Toolbox (*.pyt) to export a list of fieldnames to Excel. I have the following bits of code: import arcpy class Toolbox(object): def __init__(self): ...
1
vote
3answers
327 views

How to copy entire fields into a python list

I'am trying to find a way to copy entire fields(columns) in a feature class attribute table as lists inside a master list (python). To illustrate it, consider the table below: So the list should ...
1
vote
2answers
688 views

Creating a drop down list in ModelBuilder

I have a model that exports GIS data to CAD. The model has two nested models, the first collects the data to be exported and the other exports it. The export to cad tool has a seed file parameter ...
1
vote
1answer
244 views

Arcpy: List to point feature class

I have a list of lists that contains: [vala, valb, valc, vald, (pntx, pnty)] [vala, valb, valc, vald, (pntx, pnty)] [vala, valb, valc, vald, (pntx, pnty)] I also have a list of the field names that ...
1
vote
2answers
34 views

Append daily rasters to monthly lists in Python Arcpy

I'm trying to go over a folder of geotiff rasters where the last three digits of the raster name is the julian date and I want to append the correct days to monthly lists (Jan-Dec) and then run Cell ...
1
vote
1answer
111 views

Add layer to mxd files ignoring specific item- arcpy

I try to add layer (abc) to several mxd files with arcpy and ignoring mxd file which called "land use" . I work with arcview 10.3 : import arcpy,os,sys,string,datetime import arcpy.mapping from arcpy ...
1
vote
1answer
83 views

Can't solve “list out of range”

I'm using arcpy in ArcGIS 10.0. My code is supposed to test the intersection between all layer in a geodatabase by group of 2, and if so, erase one feature of each couple by the other depending on a ...
1
vote
1answer
41 views

Short list of .prj options in .pyt

I'm tasked with creating a .pyt to distribute across our office and field computers (state geological survey) for converting .gpx to features but constraining the choice of projections/datums to seven ...
1
vote
1answer
448 views

Multiply a raster list with a field value list in a FOR loop in ArcPy

I'm trying to create a simple map algebra calculation not managed by ModelBuilder, but writing it in Python is trickier than I thought. I have a list of raster in a GDB and I must multiply them by ...
1
vote
1answer
135 views

Returning list of field names in joined table using ArcPy?

I need to look at all the fields in a joined table performed through arcpy. I am instigating for fields in arcpy.Listfields(Feature): print fields but it is returning a large list of: ...
1
vote
1answer
1k views

Subquery a list in select layer by attribute management using python

I am new to python and having trouble with my script. I want only the records from the COMTRS field (of the pur_dbf_view) that match values from the ComtrsList to be selected; however, I am getting ...
1
vote
0answers
26 views

Looping through CSV files to write Lists [closed]

I am very new to Python and am attempting to use it for some relative humidity data. I am looking at 60 months of data. The files include a Lat and Long file (CSV in a Matrix) and Relative Humidity ...
1
vote
1answer
76 views

Store into a list multiple lists

I have list of 50 lists of pairs of SpatialLinesDataFrames. That means I have something like: [[1]] [,1] [,2] [,3] [1,] spldf1 spldf3 spldf5 [2,] spldf2 spldf4 spldf6 ...
1
vote
1answer
60 views

Multiply two lists of raster from two subfolder

I have two subfolders, which contains rasters for each country but which express different variables. I am trying to figure out a way to Loop a multiplication of each raster into a folder with its ...
1
vote
2answers
311 views

Multiply Rasters from two subfolders

I have two subfolders with Rasters named with the same parameters. I am trying to figure out a way to Loop a multiplication of each raster into a folder with its pair of the other subfolder. Looks ...
1
vote
1answer
60 views

how to separate a list of features from its shapefile_

I tried to copy all features in a list of dictionaries. the code looks as follows: def iterate_features(self): feature_set = arcpy.SearchCursor(self.address) for feature in feature_set: ...
1
vote
1answer
97 views

How do I use a generic List with my Arc Objects code?

/// <summary> /// Gets a list of all geoms in a Feature Class /// </summary> /// <param name="FClass">The Feature Class</param> /// <returns>a List of ...
0
votes
2answers
371 views

How to return the first row of feature class as a list in ArcPy?

I need to return the first record of a feature class as a list. Is this possible? I can't seem to figure it out using row.getValue() as it does not allow me to put a wildcard in there.
0
votes
2answers
48 views

ModelBuilder and Delete fields

I like to know if there is a solution to the following problem. I currently have a simple ModelBuilder workflow in which includes a list of shapefiles being copied. Within the workflow, once copied, I ...
0
votes
1answer
792 views

Parsing list object file paths for file name

I am trying to automate a naming process that takes the file name from a list of file paths to name other folders, geodatabases, zipfiles, etc. The problem I'm running into is that, I assume, I am ...
0
votes
1answer
23 views

Arcpy - LayerList - Count/Length [closed]

I use arcpy to load all layers in the current map document, and I need all layers but not the last one (this is my layer for the symbology template). How can I access the length or count of the ...
0
votes
1answer
379 views

export list as shp in R

I have a list of coordinates with which i can create a path and I want to export this list as shp. I have "shapefiles" package but I didn't find the way to do this. Is there a way to do this with this ...
0
votes
1answer
80 views

converting a python list to arcmap table [closed]

I have values stored in a list that need processing in the costDistance tool in ArcMap 10.2 (desktop). For this they need to be converted into a table or file readable by arcmap's tools. Anyone with ...
0
votes
1answer
27 views

How to slice all elements in a list to a certain length [closed]

Assuming I have a list with multiple strings in there. x = ["red", "green", "black", "orange", "purple"] I want to slice every element in the list to a certain length, eg. 4 characters. Then the ...