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Našel jsem nejdelší tokovou cestu v povodí, ale jak ji extrahovat jako polylinii?
Provádím post-povodňovou analýzu, která vyžaduje 1) získat délku nejdelší tokové cesty v povodí od horních částí až po výtokový bod (což mám díky nástroji Flow Length), a 2) mít tuto přesnou (nebo zjednodušenou) tokovou cestu jako linii, což je krok, který nemohu dokončit. Jedná se o analýzu zahrnující desítky vstupních…
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modelovat ekotopy v rašeliništích?
Dobrý den, je možné modelovat ekotop v oblastech rašelinišť s obnovenou vlhkostí? Co chci předpovědět, je přibližná změna vegetace, když uzavřu odvodňovací příkopy. Takže jsem spočítal "sinks" pomocí nástroje fill na DEM, abych získal oblasti otevřené vody, poté používám flow accumulation s volbou MFD jako hodnoty "profile…
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Podmíněný příkaz k zajištění, aby se dvě rastrové výškové plochy nepřekrývaly
Používám ArcGIS Pro a mám 2 rastrové výškové plochy na velké ploše Nazvu je Upper a Lower a ty by se nikdy neměly protínat. Horní by měla být vždy nad dolní plochou. Výškový rozdíl mezi těmito plochami se liší. Ale kvůli chybám nebo nekonzistencím v datech občas seprotínají a například na malé ploše může dolní…
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Řešení problémů s vymezením povodí městských povrchových vod
Snažím se provést analýzu pro celé město, abych definoval povodí dešťových vod pomocí DEM a pouze sběrných jímek, protože se zaměřujeme jen na povrchová odtoková povodí a také nemáme přístup k síti potrubí dešťové kanalizace. Všiml jsem si anomálie, kde se v určitých místech po celém městě objevují dlouhé rovné čáry (viz…
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Chyba v dokumentaci Raster Cut & Fill?
Myslím, že v tabulce atributů je provedena úprava (aby se řez zobrazoval jako záporný a náplň jako kladná).
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Locate Depressions Tool - Maximum Distance to Connection
I'm in ArcGIS Pro 3.6.3 I'm using the Locate Depressions to find kettles and depressions countywide. I keep getting caught up on "Maximum Distance to Connection." Looking at the documentation, it says that it's optional and "This parameter will only be applied if a value is specified for it." There is no way to NOT specify…
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Finding percent cover of classes within a polygon
Hello, I am having trouble right now with calculating percent cover of each of my classes within a polygon. My goal is to find NonBrush, Coyote Brush, and Juncus cover within my quarter acre polygon. I have a File Geodatabase Raster that has those three classes and it aligns very well with the imagery so I know the…
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Ready To Use Watershed tool versus Spatial Analyst Watershed tool?
Hello, I'm trying to dilineate watersheds as accurately as possible for a compost facility. There are two basins on site which I've chosen as my pour points for the watershed analysis. I orginally went the route of using the spatial analyst watershed tool after getting a DEM, filling it, getting flow then accumulation, and…
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Watershed tool not nesting catchments
I am trying to use the watershed tool to create watershed catchments of several sites along streams. I've used the tool with a 10m DEM. I have filled the DEM, used the flow direction tool, the flow accumulation tool, and have snapped the pour points. The pour points look to be at a the correct spots on the highest…
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Cannot edit polygon vertices in Pro – entire polygon moves instead of vertex
I am trying to make minor edits to a polygon I manually created in ArcGIS Pro. When I use Edit → Modify → Edit Vertices, clicking and dragging a vertex moves the entire polygon rather than the individual vertex. Vertices are visible and selectable, and clicking a vertex correctly highlights the corresponding row in the…
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Help with Spatial Join Overcounting Event Points in Block Groups
Hey everyone! I am working on a project and encountered an issue in my workflow for preparing data before running hot spot analysis, suitability modeling, and spatial dependence tests (Moran’s I / LISA). Before moving forward, I want to make sure my event counts are accurate. For background: My project involves point-based…
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Spatial Analysis Question
Good morning everyone, I'm working for the first time on SAR data and i find myself stucked. I have polygons of landslides and i have the points from the SAR data with the velocity for every point. I need to calculate the mean velocity of the control points inside every polygon, so i tried using Summarize Within but it…
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Slope calculation that excludes Elevation changes less than 15'
Hello, I'm looking to use raster calculator to select a range of slope values from a DEM and also exclude vertical changes that are less than 15 feet. Is there a script that would accomplish this? Thanks for any help. Best, Aaron Y.
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Rank Tool fails without an error message
I am trying to use the Rank tool, in the spatial analyst toolbox, and it fails without providing an error message. The message says it succeeded - but the tool failed and there is no output: This is being used on 4 raster data sets (attached) and the tool is set up like this: The input paths are:…
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Re: DEM CONTOURS
HI How can topographic map with contours and hillshade etc... from digital elevation model
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ArcGIS Pro Spatial Analyst tool
Hi, Can ArcGIS Pro Spatial Analyst tool help to identify rock types? If yes, how? Rock types Best, Khalil
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DEM and Rock Types
Hi, DEMs (Digital Elevation Models) are very effective for identifying watersheds, drainage basins , slopes and terrain features. Is it also helpful for identification of rocks types? If yes, how? DEM Västerås Best, Khalil
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Raster Calculator Failure
I have a student who has ArcPro on his laptop, but Raster Calculator will not run... Well it runs, but in less than a second it finishes and then there is no product... it says it made the file and where its at, but there is nothing there. We did the software repair, we uninstalled, re installed, we tried do it in the…
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Suitability Modeler-Score
Hi, is there any possibility to show individual scores of the data layers in the final suitability score? Also it this possible to make a tool out of the suitability model like an web app and change weightage online?
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Zonal Statistics
We are having trouble with the Zonal Statistics tool in ArcGIS Pro, while trying to improve our surfaces, planimetry, and potentially implement 3d Buildings... part of that workflow involves 'flattening' Building Footprints in a Digital Terrain Model: we have the Building Footprints as a polygon feature class and a DTM…
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Suitability Modeler -No Data
Hi everyone, I'm working on a suitability model and incorporating floodplain data as part of the analysis. I’ve converted the floodplain layer from vector to raster using area values. What I want to achieve is this: areas within the floodplain should not have any suitability value at all—essentially, they should be…
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Calculate principle axis of the second moment of area?
I want to calculate the principle axis of the second monument of area of polygons and was wondering if there were any existing implementations of it. This is related to the centroid, which is the first moment of area. It can be calculated it from the second moment of area, arctan(Ixy/(Ixx-Iyy))/2. So if there was a…
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Raster Solar Radiation - Shadow Values?
Hello, I want to use the raster solar radiation tool to compare the impact of tree removal measurements on solar intensity. To show that the solar radiation is bigger in tree removal areas I use a digital surface model before and after the measurements. With the solar radiation then I use focal statistics to find the…
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Extracting UK postcode district latt and longs
Hello, I'm looking to create service areas by grouping postcode districts together and assigning specific days of the week, would this application allow me to extract the latt and long for each of my service areas?
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Zonal Statistics values are different then Statistics in info for my raster
Hi, I have a raster that when I open it says it goes from 441 to 474, their values. I want to know the sum of the values in that raster, and when I use both zonal statistics or raster layer statistics to see the sum, the min and maximum it gives me is 166 till 621, so I am not sure what happens there and if I can even…
