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caseycowan in Analysis1 week ago (Show more Show less)

Why is XTools Create Random Sampling Points Not Creating the Number of Points I ask.

I have a polygon that I need four random points generated in. I also need each point to be at least 100 meters from each other. Every time I run the tool I feel like I get a different number of points generated; sometimes it's one, sometimes it's four. Also they aren't always inside the referenced polygon. I have tried not including the minimum… (Show more Show less)

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Dan_Patterson

(to caseycowan) 6 days ago (Show more Show less)

Use Copy Features tool and copy the shapefile to a geodatabase so I can see the native area units. Project the shapefile first to a projected coordinate system if it isn't already projected (I think it is)

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MonikaH in Analysis2 weeks ago (Show more Show less)

Suggest - Locator and Geocode Service

Hello, I enabled suggestions on my simple locator which consists of place names in "Name, County" format. As it happens, there are several places within the same county having identical name (e.g. Newtown, Hampshire). I published this locator as a geocode service and enabled suggest capabilities. I tested Suggest rest API call and only got one… (Show more Show less)

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MonikaH (to sbritt-esristaff) 2 weeks ago (Show more Show less)

Hi Shana, thanks for replying. I used the General - City State Country style. I tried both options where County = State, County = Country with same results: Suggest request returns one result: Compare to Find request which returns all 10 places: Monika

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rudgeg in Analysis4 weeks ago (Show more Show less)

Problem with an ETRS89 to OSGB transformation in the project tool

I'm projecting a shapefile currently supplied in ETRS89 format to OSGB 1936 in ArcGIS 10.4.1. I have followed the advice given by ESRI UK (Adding the new OSTN15 NTv2 transformation — Esri UK ) to ensure that the latest transformation is available. I have downloaded the transformation files, added them in my Arc directory as per the instructions,… (Show more Show less)

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rudgeg (to rudgeg) 2 weeks ago (Show more Show less)

Many thanks for the replies to this post, Melita and Duncan. I achieved a workaround by transforming to WGS84 and thence to OSGB. The accuracy looked good to couple of metres or so, which is sufficient for the analysis I'm working on. I followed Melita's suggestion, repeating all of the steps in the advice from ESRI but ensuring the addition of…

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apazsaw1_GISandData in Analysis3 weeks ago (Show more Show less)

Using Google Earth historic imagery

Hey, I'm trying to use google earth pro's historic imagery option which shows layers from different dates, to analyze changes in infrastructure - in particular, new buildings in different villages, by comparing current and old satellite imagery. For now I am doing this manually, but I'm sure there's a better way. I have two issues: 1. Can one… (Show more Show less)

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cdspatial

(to apazsaw1_GISandData) 2 weeks ago (Show more Show less)

The folks on here who do Remote Sensing work can probably chime in with specifics, but yes there are imagery resources out there that one can download for use in change detection. The first one that comes to mind for me is Landsat, but there are many others. One key limiting factor, though, will be which part of the world you are interested in…

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Cursus in Analysis2 months ago (Show more Show less)

How do I associate values from one polyline to a second polyline?

Hi, there is I hope an easy solution. I have a cost path (now unsplit polyline) and wish to associate values from another polyline to segments of the cost path. In this case the cost path shows routing but I want to associate speed limits on segments of the line as well which are in a second line feature. I have done something similar with… (Show more Show less)

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cdspatial

(to Cursus) 2 weeks ago (Show more Show less)

What Dan Patterson suggested is the way to go. Intersect—Help | ArcGIS Desktop Spatial Join—Help | ArcGIS Desktop Spatial joins by feature type—Help | ArcGIS for Desktop Caveat: One usually has to play with the settings to produce the best results, so expect to do a few iterations. Also, unless one has really really good data, there…

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parkygis in Analysis3 weeks ago (Show more Show less)

line clip or segment by adjacent polygon

Hello. I am trying to clip or create split lines by an adjacent polygon. if you see the attached image, the line is a river and the polygon is some property. I would like to cut the line as marked yellow. if you have a good idea please let me know. I was thinking about left or right buffer and mask it. I think there are a better idea for… (Show more Show less)

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

Another approach could be this: Explode the pink polygon into it's vertices Snap all these points along your river network From these snapped points Identify the nearest and furthest away point from the river mouth. You now have a pair of points which would be the start/end of the line you want to create. You would want to remove all the points…

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jbrengel in Analysis3 weeks ago (Show more Show less)

Can I adjust values of a NetCDF file's variable based on time dimension values?

Hello, I'm reading NetCDF files containing daily CPC precipitation data from NOAA's ESRL website. The website reads the precipitation "values are accumulated from 12z of the day before to 12z of the day." From what I've read, 12z stands for 12 noon in Greenwich (UTC), which is either 4 or 5 hours ahead of Eastern Standard Time (EST),… (Show more Show less)

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paul.haakma in Analysis2 years ago (Show more Show less)

How to find the maximum rectangle contained within a polygon

Hi. There is are arcmap tools that can return a bounding box/rectangle/envelope etc for a given feature (e.g. set of points, line or polygon). I am trying to find a similar tool that will return the maximum rectangle that can be created that is *contained within* the features. Here is a link to the Arcmap/Pro tool: Minimum Bounding… (Show more Show less)

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Dan_Patterson

(to oliver_burdgis) 3 weeks ago (Show more Show less)

Cool! another algorithm to play with!

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Dan_Patterson mentioned Analysis 4 weeks ago Show mention context Hide mention context

Re: manage dozen of DEM and hydrology analysis

Dan_Patterson mentioned Analysis 4 weeks ago

You have this in the ArcGIS Online Place... you don't want to do this in AGOL do you? If not, you might want to move it to Arc Hydro or Analysis or something more suitablePreview Hide preview

parkygis in Analysis1 month ago (Show more Show less)

sequential difference in a single column with field calculator

Hello, I have a column for elevation for a point data set. I would like to create a new column to show a difference between Row(n) and Row(n+1) values. well, I assume that the easiest way is calculating in EXCEL (=abs(A1-A2)) then make a join at ArcGIS. However, I would like to the process with "Field calculator" Does anyone know how to do… (Show more Show less)

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parkygis (to Dan_Patterson) 1 month ago (Show more Show less)

Thanks Dan, I should have changed just the field of question. I really appreciate your helps.

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