Latest Contributions by TilottamaGhosh

‎09-19-2019

Hi, I have built a model (please find attached) for which the output is several dbfs having five columns. I want to merge all the dbfs in the model itself. How would I go about doing this? Thanks! Tilo

‎09-19-2019

Hi Dan, Thanks for your reply. I was able to run the model using Summary Statistics and now have a different question. I will put the question in a separate post and will look forward to a reply. Thanks, Tilo

‎09-19-2019

Hi, I am running a model, and in the end I need to get a count of the rows, 'collect values' (model builder tool) and 'calculate values' (model builder tool) and get the output in a table. I am unable to do this. I am using the python code from this post arcgis desktop - Using ModeBuilder to populate a table with the feature count of multiple feature classes - Geographic I… , but running into an error with the python code block - def sum_counts(counts): if counts.find(';') == -1: if counts <> '#': return int(counts) else: return 0 else: return sum(map(int, counts.split(';'))) What am I doing wrong? How will I achieve getting a count of the rows and putting the output in a table. Thanks, Tilottama

‎09-18-2019

Hi, I have built a model for a set of steps which I want to complete. In the last step I want to get a count of all the rows (boat points shapefile attribute table) for each day in a month. The output should be a table showing the number of boats in each day of the month. Here is the model I have so far. I am unable to run successfully the last part. I got this idea for the last step from this discussion - arcgis desktop - Using ModeBuilder to populate a table with the feature count of multiple feature classes - Geographic I… . However, I am getting an error in the python code. Any advice would be of great help. Thanks, Tilottama

‎07-12-2019

Thanks Egge. the code in the above link does not work for qgis 3.8 -Tilottama

‎07-10-2019

Hi, I am trying to use the Zonal statistics tool in QGIS to extract the sum of several raster layers. I am using QGIS 3.8. It is best to use the python console as I have several raster layers. The codes which I got in some of the old discussion forums is not working. Here is an example of what I tried till now - import glob, os, qgis.analysis vectorlayer = qgis.utils.iface.mapCanvas().currentLayer() rasterfolder = 'C:/Users/…/Folder/' os.chdir(rasterfolder) for lyr in glob.glob("*.tif"): qgis.analysis.QgsZonalStatistics(vectorlayer, lyr, attributePrefix=lyr, rasterBand=1).calculateStatistics(None) I have to do this in qgis because the class I am going to teach does not have access to ArcGIS. Thanks, Tilottama

‎05-13-2019

Hi Sarmistha, Thanks so much for your detailed reply. I had stopped working on the project and have come back to it again. I am trying to extract the raster values by overlaying the polygons (3 million plus) by writing a python script using zonal statistics. I have set the environment variables this way in the code - # Set the cell size environment using a number. arcpy.env.cellSize = 0.00001 Am I correct in understanding your suggestion? Please let me know what you think. Thanks much, Tilottama

‎03-26-2019

Hi Dan. Thanks for your reply. To answer your questions - 1. Yes, both the tif and the shapefiles are in the same coordinate system - WGS 1984 2. I tried by turning off background processing. 3. The polygons are only 10 in number. This is a subset of some 3 million polygons of building volumes. The extents are not set to overlapping in the Zonal statistics as Table tools. It failed. Did not work. If you have any other suggestions, please do let me know. Thanks, Tilottama

‎03-25-2019

Hi, I am unable to run Zonal Statistics as table successfully and getting the unknown error 99999. I don't know what is going wrong. I am attaching the shapefile and the raster I am using. If someone can let me know what is going wrong, I will be very grateful. Thanks, Tilottama

‎03-25-2017

Thanks, Ken! I got someone in an organization who has an ArcGIS Pro to make the buffer for us using the Pairwise buffer tool, and he did say that it was done in minutes! Thanks very much, Tilo

‎03-22-2017

How will I check it? I don't see anything in the processing results.

‎03-22-2017

Hi Ken, I am using Desktop ArcGIS 10.4.1. The machine I am working on has an i7 processor, 16 GB RAM and 64 bit operating system. Thanks, Tilo

‎03-22-2017

Tried in Mercator's after you suggested but it failed. Thanks.

‎03-22-2017

Hi Neil, Thanks for your reply. Tried running it as a feature class in a file geodatabase. It failed.

‎03-22-2017

Hi, I am trying to buffer the coastlines of the whole world with a 500 m buffer. It has been failing repeatedly. I tried 'dividing' the data into western and eastern hemisphere, and then it failed too. The error code is 999999. Any ideas? Dicing tool won't work in my case. What else can I do? I am attaching the western hemisphere part of the data with this mail. Thanks in advance! Tilo

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Date Last Visited	‎11-11-2020 02:24 AM

My Ideas

Latest Contributions by TilottamaGhosh

adding dbfs in model builder

Re: Getting a count of the rows and having the output in a table using model builder and python

Getting a count of the rows and having the output in a table using model builder and python

How to get a count of rows from an attribute table and output in a table in model builder

Re: Zonal statistics in python console in qgis 3.8

Zonal statistics in python console in qgis 3.8

Re: Zonal statistics failing with error 99999

Re: Zonal statistics failing with error 99999

Zonal statistics failing with error 99999

Re: buffering a large polygon shapefile

Re: buffering a large polygon shapefile

Re: buffering a large polygon shapefile

Re: buffering a large polygon shapefile

Re: buffering a large polygon shapefile

buffering a large polygon shapefile

Extract linear features from raster image with 15 ...

Re: calculating the sum of values of points within...