Questions tagged [python-2.7]

Version 2.7 of the Python programming language

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16 views

ArcPy to select by location not showing selected features in attribute table

I have a button where it first calculate no of features in a specific layer and then runs the "are_identical_to" and update "D". After that it checks if the no of counts in two layers is same? If not, ...
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1answer
24 views

Combobox value increment and update

I have made a custom add-in for my building ID update tool. The objective is: user will write an alphanumeric value in the combobox like 'x100'. When a user selects a bunch of polygons(building) and ...
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0answers
20 views

My UpdateCursor is not working. The attribute table of my new shapefile is not updating [closed]

I am new to arcpy. I am trying to do a few things with a shapefile. First I created a new shapefile with specific dataset that I wanted to work on. So far everything works until the UpdateCursor. When ...
4
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1answer
69 views

Not able to update the “ACTION” field

Currently I am working on a GIS project where I have to update a field in a layer with some values to get my work done. Because the manual efforts are time consuming hence I added a custom addin to my ...
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2answers
42 views

How to access/manipulate a feature class/dataset in a personal database by using cursor via ArcPy?

I wrote an ArcPy script which uses cursors and it works fine with shapefiles. However, it does not work if I execute the same thing in a personal geodatabase. Should I use different format for a ...
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0answers
23 views

Error local variable “elevation” referenced before assignment" [duplicate]

I had got this error when I try run Qwater model. "2019-09-15T19:47:05 WARNING Traceback (most recent call last): File "C:/Users/OS10/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\QWater\...
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1answer
42 views

Finding intersection point between two arcs? [closed]

I am trying to find the intersection between two arcs. I have done this for line segments using shapely package. Does anyone have any advice?
1
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1answer
33 views

Turn string data (of GPS coordinates) into a GPS tracker = frozen map. QGIS2.14/Py2.7/Win7/LAN

I am currently involved in a student project which is to turn string GPS coordinates into a GPS tracker. This is my current work: First, the UDP data is shared through a LAN (No internet available) ...
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0answers
54 views

Using UpdateCursor in the same loop as SearchCursor

I have 2 layers, one with land plots and one with hazard zones. I want to iterate through the layer with land plots and for every plot I want to add 2 (or 3, depending on some variables) fields. Then ...
1
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1answer
30 views

Updating gdb with JSON?

parcelsFC = os.path.join('temp.gdb',JsonDirectoryLocation) arcpy.JSONToFeatures_conversion(parcelsFC) Created gdb with above code. How can I add attributes to gdb with another JSON file?
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1answer
93 views

Getting India map on QGIS canvas using PyQGIS?

Can I get India map extent in one click from OSM tile on canvas using PyQgis? This is my code snippet. canvas = iface.mapCanvas() urlWithParams = 'type=xyz&url=https://a.tile.openstreetmap.org/{...
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0answers
24 views

Layers being removed erroneously at Python script tool finish? [closed]

I've got two Python scripts as a tools in a standard toolbox, and when the tools finish they will sometimes remove a layer from the MXD. It is most likely to happen on the first run of the tool ...
2
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1answer
4k views

Error installing Shapely package using pip command

I'm using Windows 10 and python 2.7. Even though I updated pip it's getting error: ERROR: Command errored out with exit status 1: command: 'c:\python27\python.exe' -c 'import sys, setuptools, ...
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0answers
15 views

Earth Engine API (Python) Retrieves script found at a given path as a module not working

Earth Engine API says that require(path) returns an object that represents exported members from the required module. When I try to import ee-palettes with: palettes = require("users/gena/packages:...
2
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0answers
60 views

How to capture the event whenever the items inside a listview are checked

I'm developing a plugin in QGIS 2.8.2 using Pyqt 4. Well the idea is using the processing 'qgis:extractbylocation' from the QGIS algorithm provider to capture the studied area # Récupérer tous les ...
1
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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 = ...
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0answers
13 views

Arcpy exporting feature by attribute in ArcMap 10.3 [duplicate]

I'd like to automate exporting each polygon feature by attribute(year) in a shapefile to seperate shapefiles named by year Now I know this exists in arcpy with 10.5 or higher using the ...
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0answers
53 views

Set default version of Python in ArcGIS to 64-bit?

This is the output from Python terminal within ArcMap 10.6.1 for Windows 10: >>> import sys, numpy, matplotlib >>> print(sys.version, numpy.__version__, matplotlib.__version__) ('2....
2
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1answer
59 views

Getting coordinates on click and pass it to dialog using PyQGIS?

I am creating a plugin in which i need to get coordinates by clicking on QGIS canvas so i tried the solution mentionned at Getting coordinates by clicking on QGIS Canvas with PyQGIS? but it didn't ...
1
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1answer
49 views

To update Point location every 1 second

I am using update cursor to change the location of a point with FID = 0 every second, but whenever I run the code my ArcGIS freezes and point doesnot move. I am visualizing an output where the point ...
1
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0answers
35 views

Snapping line to polygon border using PyQGIS?

I want to snap the line (completely present inside the polygon) to polygon boundary. I tried create 10 m buffer on line start and end point to get polygon and check intersection between line and ...
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2answers
156 views

How to create a weighted square lattice as well as a weighted network graph

I am planning to create a weighted square lattice for different sizes, and then label each edge with its associated weight. It's similar to this thread "How to load a weighed shapefile in networkX" ...
2
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1answer
30 views

I have the following multilinestring, and I am looking for finding the intersection between each pair

I have a pair of lines, which I like to find the intersect of each of one them with each other. I know for two lines I can do the following: from shapely.geometry import LineString line1 = ...
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0answers
69 views

Loading .qgs and .qpt files in standalone PyQGIS script?

I have a .qgs and .qpt files. And I would like to know if it is possible to use them in a standalone PyQGIS script? I am using QGIS 2.18 and Python 2.7 This is the template that I would like to use. ...
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0answers
24 views

JSON response to shapefile [closed]

I'm collecting road accidents from an API through a Python request and getting my response as JSON. The JSON response contains coordinates and general information as below. {u'RESPONSE': {u'RESULT': ...
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0answers
47 views

How to find which direction to flow between two points in QGIS Python? [closed]

I want to find which way direction to go based on two points and line segment. I have two layer line layer and point layer.user selects the two points in lines layer. I have to find which direction to ...
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0answers
49 views

QGIS temporary layer to PostGIS table database

I have an empty polygon table in PostgreSQL/PostGIS database with fields (id,field_1). after some processing in QGIS using pyqgis and processing toolbar I create some temporary layer like this case : ...
0
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1answer
100 views

How can I run an ArcPy Python Toolbox from Python3-shell?

I am trying to port an arcpy python toolbox from ArcMap to ArcGIS Pro. In ArcMap I had to use the 64-Bit-geoprocessing tool because of the size of the datasets, so I wrote a wrapper-Script for the ...
4
votes
1answer
218 views

Filter vector layer by searching through complete attribute table - limitations and improvements

In a case were I have a shapefile with a lot of attributes (predominantly text), also I don't have any information about the structure and I don't have any idea in which attribute I have to search/...
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0answers
24 views

arcpy.Project_management - different results from python shell and python command line

I am trying to transform a number of shapefiles by script using a self-defined custom transformation. When I transform the shapefile using my script in the python shell of the ArcGis GUI everything ...
2
votes
1answer
166 views

Accessing Home directory of ArcMap using ArcPy?

I want to access to a directory and set that as a arcpy.env.workspace in my Python Script Tool. However, this workspace depends on users so I cannot just use my own folders. Is there a way to access ...
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0answers
19 views

Snap pour points not recognizing sample sites as valid points when using ArcPy?

I am trying to go from a CSV of sample sites and a DEM to creating watersheds. I can process the DEM fine to stream networks and can import the points (first to event layer, then convert them to a ...
0
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0answers
101 views

How to upload ImageCollection from GEE to CloudStorage (Bucket) automatically Python/JavaScript [duplicate]

I have some ImageCollection with around 120 images in the GEE Web IDE. I want to upload them to a Google Cloud storage bucket. But it raises the Error: I think because the export function is only for ...
0
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1answer
55 views

Get Messages from Geoprocessing Service

I have created a Geoprocessing service that is hosted on a server inside our firewall (ArcGIS Enterprise 10.6). The GP service adds messages via arcpy.AddMessage("msg"). Locally, I import the toolbox ...
1
vote
1answer
89 views

Array in python just full of zeros when opened using GDAL

I'm working on the below script. What I'm trying to do is create a stats.txt file output which has the Land Cover Class ID, Fractional Coverage (of that class) and the number of pixels (of that class) ...
2
votes
1answer
114 views

How to find how grass's r.viewshed works programmatically?

I want the Python source code of Grass's Viewshed analysis. In QGIS software there is only an .exe file of that algorithm. Although I'm not sure whether it's written also in python or not. Where can ...
0
votes
1answer
39 views

PyQGIS import from UI class problem

I've tried to build a plugin from scratch to better understand the plugin structure and so on without the help of PluginBuilder or similar tools so my code could contain flaws. I went through every ...
1
vote
1answer
547 views

NumPy array to Raster file (GeoTIFF)

I converted a raster file (one band grey scale) to an numpy array and set a range to it. I Did like that: import gdal import numpy ds = gdal.Open('H:/GDAL_docs/a.tif') myarray = numpy.array(ds....
1
vote
1answer
60 views

Joining single column in ArcGIS Desktop with Spatial Join

I'm trying to automate a rather annoying workflow in ArcGIS 10.4 with a Python script. My goal is to extract data from a polygon shapefile into another polygon shapefile which is arranged as a raster (...
0
votes
1answer
75 views

Configuring ArcGIS Desktop to use already installed Python instead of own installation? [duplicate]

Whenever ArcGIS Desktop is installed, it installs its own installation of Python 2.7 plus Numpy. Yet, I already have many different versions of Python installed in my machine and do not want to have ...
1
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0answers
51 views

gdalcalc.py in Python 2.7 subprocess Popen - not spawning, nor any Exceptions

from subprocess import PIPE, CalledProcessError, Popen import subprocess import osgeo raster = '/home/rphillips/Desktop/tif_dir/merged.tif' raster_dir = os.path.dirname(raster) binary = raster_dir +...
1
vote
1answer
298 views

Comparing pixel values at a given point in two rasters

I have two raster images, one for land use and one for NDVI, i would like to calculate LAI based on land use. So i need to compare the pixel value in the NDVI raster and Land use raster then select ...
1
vote
1answer
57 views

Merging on specific fields

Lets say I have three shapefiles/features I want to merge: 'florida.shp', 'mississipi.shp' and 'louisiana.shp'. They all have 3 standard fields common to all: 'DFIRMID', 'SFX', and 'FIRMPAN'. I want ...
2
votes
1answer
56 views

Copying feature classes from gdb to different folder locations in Python?

I am very new to Python, and I'm trying to create a function where I'm copying over feature classes from a gdb to different folder locations as shapefiles. The script needs to be reading from a ...
1
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0answers
116 views

Numpy import error in OSGeo4W Shell

I and my colleagues are running into a very frustrating Python import error while using the OSGeo4W Shell. Any time we attempt to use gdal_calc in a Python script, we get the following error message: ...
1
vote
1answer
42 views

Loading shapefiles in standalone PyQGIS application without GUI

One of the related questions mentions an issue with import order, but I don't think that applies here because this is a command-line script: I'm not using Qt, only QGIS libraries. I'm trying to run ...
4
votes
1answer
114 views

Why does osr.SpatialReference return different values in python2 and 3?

Can somebody explain why the result of osr.SpatialReference() differ between Python 2 and 3? sr = osr.SpatialReference() sr.SetFromUserInput('EPSG:28992') sr.ExportToProj4() In Python 2.7 this gives ...
0
votes
1answer
87 views

Choosing correct Projection name for ArcPy?

I am trying to plug in a projection name to my code, but I think the syntax/name is incorrect. arcpy.env.outputCoordinateSystem = arcpy.SpatialReference("US Albers Equal Area Conic") When I run the ...
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0answers
79 views

Using Null Values in Raster To NumPy?

I am trying a convert a raster dataset [a simple 4 x 4] into a numpy array using RasterToNumPyArray. Here is my sample raster dataset: RasterToNumPyArray however, returns zero for Null values: ...
1
vote
2answers
148 views

replaceDataSource() works in ArcMap but not as stand-alone script

I have one script (and one alternative) that I want to use to replace a broken data source. Neither is working outside of the ArcMap Python Window. Has it something to do with the MapDocument object? ...