Latest Contributions by Deepa

‎10-14-2021

Thanks for all the inputs :)

‎10-13-2021

Hello all, I have a raster with suitability value ranging from 0 till 1. 0 indicates least suitable and 1 is the best. In other words as value increases from 0 to 1, suitability also increases. I am looking for an exactly 100 square kilometres of areas from this raster image with high suitability value(SV). I am doing trial and error by reclassifying the raster image with 0.8 and above values and then checking the overall size from the attribute table. If it is more than 100 Sq km then i make a another (higher) cut off in reclassifying like 0.85 and then checking the cell numbers of the result. Is there some other simpler way to do this than doing trial and error? Thank you !

‎08-12-2021

Hi, I am trying to use the script tool i made in the model builder. I want to get the output name as given by the user. For that "Output raster" is defined as string and the direction is Input in the parameter settings for that. But then i could not see the output in the model builder so i added the "out file" as the fifth parameter with data type as raster and direction as output and type as derived obtained from blank. It still did not work. I want the green output in the model builder to get the name i defined in the string, in this example: test2 should be in the green color instead of outfile and to use this output for the next steps in the model builder. How to do that? Thank you!

‎08-12-2021

The script worked when i changed the datatype as work space in tool parameters and saved output in geodatabase. Also made a minor change in script like this. field = "OBJECTID" arcpy.FeatureToRaster_conversion (in_features, field, "out1", 25) OutRas = Con(IsNull("out1"), 1, newValue) OutRas.save(save_raster) Thanks for your helpful inputs :)

‎08-11-2021

Hi, Thanks for the reply :) I defined OBJECTID as the field and the script is here: #Two tools combining here field = "OBJECTID" arcpy.FeatureToRaster_conversion (in_features, field, save_raster, 25) OutRas = Con(IsNull(save_raster), 1, newValue) OutRas.save(save_raster) However when i try to run the script tool with the changes as you suggested i get a final raster map with wrong values like in the image attached(The expected result is a raster map with values 0.01 and 1) . Also ArcMap crashes after this.

‎08-10-2021

I am trying to combine two operations (Feature to raster and Conditional operation) using python script in ArcGIS to create a customized tool. I would like this tool to be transferable so my friends can feed in their inputs - polygons and conditions, to get a raster output. I have a polygon shapefile with me. Firstly, I would like to convert the polygons into a raster. Secondly, the rasterized polygons need to get values like 10% or 20% (user-specified values) the rest (outside polygons) gets a value of 1. To do this I have attempted with a script, then got stuck. My python knowledge is minimal so please excuse me for silly mistakes :) I guess the error is where I don't know how to define the output from the feature to raster conversion. The script is here: I am trying to combine two operations (Feature to raster and Conditional operation) using python script in ArcGIS to create a customized tool. I would like this tool to be transferable so my friends can feed in their inputs. I have a polygon shapefile with me. Firstly, I would like to convert the polygons into a raster. Secondly, the rasterized polygons need to get values like 10% or 20% (user-specified values) the rest (outside polygons) gets a value of 1. To do this I have attempted with a script, then got stuck. It would be great if you could guide me through it. My python knowledge is minimal so please excuse me for silly mistakes :) I guess the error is where I don't know how to define the output from the feature to raster conversion. The script is here: import os import sys from arcpy import env from arcpy.sa import * #Import all modules in arcpy.sa path arcpy.CheckOutExtension( "Spatial" ) #The environments for the work is set up here arcpy.env.cellSize = 25 arcpy.env.overwriteOutput = True in_features = arcpy.GetParameterAsText( 0 ) # In tool,Datatype is feature class folder = arcpy.GetParameterAsText( 1 ) # In tool, Location of output folder raster = arcpy.GetParameterAsText( 2 ) #In tool, output raster name is defined as string in the tool # newValue newValue = float (arcpy.GetParameterAsText( 3 )) # use float or int and assigned as strings in the tool #The formatable folder location and name for output arcpy.AddMessage( "Folder: {}" . format (folder)) arcpy.AddMessage( "Raster: {}" . format (raster)) save_raster = os.path.join(folder, raster) arcpy.AddMessage( "Save Location: {}" . format (save_raster)) #Two tools combining here #Feature to raster conversion - Not sure how to write the output raster from this step. arcpy.FeatureToRaster_conversion (in_features, "" , out_raster , 25 ) #In the next line, the condition i would like to apply is if there is value within the raster layer, it gets newValue(user defined), otherwise 1 OutRas = Con(out_raster, "" , newValue, 1 ) OutRas.save(save_raster)

‎02-09-2021

No I have two criteria or criteria maps for a study area. First criteria map shows the distance to powerline which i want to minimize and the other criteria map is distance to residential which i want to maximize. I would like to compare each pixel with other pixel in the study area. If the pixel 1 doesn't perform well in both the objectives in comparison with any other pixel in the whole study area, i would like to eliminate it. I want to check this for all the pixels through comparisons with one another in the study area . Finally i want to be left with those pixels where it is hard to choose since in every pixel only one objective is dominated (or one objective only wins) and the other objective objective is not dominated (other objective is lost). I hope it is clear :)

‎01-26-2021

Hi, I am using ArcMap 10.8 version. I have 10 raster files with different data ranging from 0 to 1 for the same study area. I am interested to study how the data from 10 raster files are distributed in each pixel. I want to calculate the skewness of the data in each pixels. How can this be done in ArcMap? Thank you!

‎12-18-2020

Thanks Randy :) I have worked with weighted overlay but this time i was looking for something different. I want to compare both objectives pixel by pixel and see if there are pixels that i can clearly eliminate since they dont perform good in both objectives in comparison to any other pixel,

‎12-15-2020

HI David, Thanks for the reply :) What i am trying is to take each pixel by pixel and compare one another to eliminate the pixels that clearly perform badly interms of all 5 objectives. I want to first take two objectives/factors that is maximise solar energy and maximise distance to residentials. for every pixels. Comparing pixel 1 and pixel 2, if pixel 1 dominates pixel 2 in terms of both factors, i want to eliminate pixel 2. Similarly the pixel 3 with pixel 4, pixel 5 with pixel 6 etc through out entire study area to eliminate the clearly bad pixels. I want to finally have a set of pixels where it is hard to choose a pixel since every pixel dominate other one in terms of one objective. Then I want to check with this set of pixels with next set of objectives. In other words, a non dominant sorting of pixels with my 5 objectives (2 maximising and 3 minimising).

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Date Last Visited	‎10-14-2021 08:20 AM

My Ideas

Latest Contributions by Deepa

Re: High raster values with 100 Square kilometre area

High raster values with 100 Square kilometre area

Output in model builder with python script tool not working

Re: Customised tool in ArcGIS using ArcPy

Re: Customised tool in ArcGIS using ArcPy

Customised tool in ArcGIS using ArcPy

Re: Pareto optimal maps in ArcGIS

Skewness of values from 10 raster images

Re: Pareto optimal maps in ArcGIS

Re: Pareto optimal maps in ArcGIS