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robaire in Analysis1 day ago (Show more Show less)

Geographically weighted regression problems

Geographically weighted regression: ArcGIS Pro 2.4 and MGWR #GWR There are large difference between the results of an ArcGIS Pro gwr and those of Fotheringham et al. Multiscale Geographically weighted regression. The difference is stark when mapping one of the parameter estimates. Results below suggest that some kind of smoothing function is… (Show more Show less)

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spk578 in Analysis3 days ago (Show more Show less)

Where did Arcade come from?

I hope I'm not the only person asking but where did the Arcade expression language come from? I kinda guessed from the Arc bit of it that it might have been developed by ESRI however, if there's any history it would be nice to see. The only thing I uncovered is: Arcade is a lightweight and secure expression language written for use in the… (Show more Show less)

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Dan_Patterson

(to spk578) 3 days ago (Show more Show less)

Avenue... Part 2

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bhall_CUD in Analysis2 weeks ago (Show more Show less)

Is it possible to build a custom geolocator based upon subdivision name and lot number?

I've been approached by our company's wastewater division to create geocoded data from an Excel spreadsheet. Normally, this would be easy, but the spreadsheet contains a list of subdivision names and lot numbers where step tanks have been installed. There are no addresses, latitude, or longitude information available in the spreadsheet for these… (Show more Show less)

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sbritt-esristaff

(to bhall_CUD) 3 days ago (Show more Show less)

Bethany: 1. Is there any address information associated with the certificate of occupancy that was maintained by the Step Dept? 2. In the parcel data are the lot and subdivision values in separate fields? If so, you could probably get away with creating a locator with the Create Locator tool using the PointAddress role where you map the Lot…

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robaire in Analysis4 days ago (Show more Show less)

summarize raster values to polygon

#summarize raster; #raster values to polygon Working with ArcGIS Pro, I can't find an easy solution to what I used to be able to do in ArcGIS with XTools Pro: extract raster values to polygon, which allowed for zonal statistics to be created for each polygon: sum, mean, standard deviation, min, max, etc. My interest is "value" from a raster,… (Show more Show less)

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robaire (to robaire) 3 days ago (Show more Show less)

Thanks, Dan. Eventually that worked. At first I was looking for a way to get the desired values directly into the polygons. You used to be able to do so in ArcMap using XTools Pro surface tool, Aggregate by Attributes. But you have to careful there to chose Polygon as the aggregation geometry. I didn't at first. Spatial analysis in ArcGIS Pro…

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k.mishiro in Analysis2 months ago (Show more Show less)

Creating (Circle) Polygon with Specific Area Size

I am wondering if the ArcMap (10.6) or ArcGIS Pro (2.3.3) allows us to create circle polygon with setting specific area-size, instead of radius? Thank you in advance.

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bixb0012

(to k.mishiro) 2 weeks ago (Show more Show less)

Are you thinking of a GUI tool/interface?

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mmcdermott2212 in Analysis2 months ago (Show more Show less)

Using a Point as an Obstruction for Sight Line

I am trying to figure out how to account for lack of visibility in a camera. So the star below is a camera and the crosses are towers. The circles represent what area my camera can see. I need to remove from this circle the spots behind the towers that my camera cannot see. It would be roughly one degree. What is the best way to do this? I have… (Show more Show less)

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Hornbydd (to mmcdermott2212) 2 weeks ago (Show more Show less)

It is not clear what you are asking, you define the star as your camera, the circle the limit of what the camera can see and the crosses are towers then you say: I need to remove from this circle the spots behind the towers that my camera cannot see What are the spots? What do those two blue lines meant to be? How are you defining "behind". You…

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kathyf33 in Analysis3 months ago (Show more Show less)

Accumulate values in a raster in Modelbuilder

I’m using Modelbuilder with a defined For loop (1 to 1000, for example) and a submodel. In each iteration of the submodel, I create a distance raster that I want to add to an Accumulation raster (which I want to be initially 0). After the 1000th iteration, I want to put the Accumulation raster into a geodatabase. To be clear, I don’t want to… (Show more Show less)

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Hornbydd (to kathyf33) 2 weeks ago (Show more Show less)

I think you need to edit your question and show the models you have.

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Jo_182 in Analysis3 months ago (Show more Show less)

Selecting a random subset of grid cells

I need to select a random subset of spatially independent grid cells for a species occupancy modelling study. I defined my sampling units as 100x100m grid cells covering the entire study area. However, these grids are continuous and not independent from one another (see attached). I would like to select a random subset of grids (let's say 50%)… (Show more Show less)

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Hornbydd (to Jo_182) 2 weeks ago (Show more Show less)

There are two approaches to this problem: Select random rows from tables You could use the code here to randomly select rows in your grid layer, assuming they are polygons. However this does not impose the spatial criteria of at least 100m separation distance, so you would need to adapt the code to test for this scenario and adjust…

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keithaddison in Analysis3 weeks ago (Show more Show less)

Linear referencing - how does Arc decide which end of a line to start with?

Using ArcMap 10.3.1 - I applied linear referencing to a big tangled looping around on itself many times mass of separate polylines (I didn't combine any of them, all had a unique identifier) I used the two fields option as the measure source with a FROM and TO attribute field. What I haven't been able to figure out is how the program determined… (Show more Show less)

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tkowal (to keithaddison) 3 weeks ago (Show more Show less)

The LRS will by default increase in the "Direction" in which the line originally drawn. (You can change this behavior). So in order to visualize in which direction each line segment is increasing I go to the Line properties symbolization and choose a symbol with an arrow head at the "end" of the line going in the direction of travel…

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lunagolya in Analysis5 years ago (Show more Show less)

centerlines from polygon canal network

Hello, I was wondering if anybody has recently converted a complex polygon or raster canal network to centerlines? ESRI toolboxes or third party tools are moving targets so some of the old threads are hard to apply. The canal polygon network that I have was created by cutting out nearly 20,000 mounds and agricultural beds from a shallow lake… (Show more Show less)

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xander_bakker (to FatihDur@logan.qld.gov.au_LoganCity) 3 weeks ago (Show more Show less)

Hi Fatih Dur , There are a couple of tools you can use to calculate the optimal route between multiple points in raster format (you will need to have access to the Spatial Analyst extension. This will require a raster that contains the "cost" for each cell. Normally this is creating by weighting several layers using tools…

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