Latest Contributions by DanielNutsford

‎03-25-2019

Hi, I am getting an error when running the DEM Reconditioning Tool in ArcPro 2.3 (see error message below). I am using a raster layer as the input streams layer, as the tool also does not accept a feature class input. Has anyone experienced this issue, or have any ideas what might be causing it? I am using the latest toolbox download available for Pro (downloaded this week) Cheers! Dan

‎01-15-2017

Hi! I want to grow streets across a specific project area/site. I have imported a terrain image and obstacle layer in NZTM2000 and it looks OK. However when I "grow streets" they are created near the origin point of my projection (i.e. 0,0 - no where near my project area). This happens whether I use the obstacle layer or not when growing streets. I am new to CityEngine so its probably something basic but cannot find anything online. Ideally I will be able to control where the streets grow (i.e. only inside my terrain extent) and outside of some areas (i.e. my obstacle layer) Thanks, Dan

‎07-28-2016

I am having trouble displaying related tables in ArcGIS Portal. After clicking on "show related records" from the pop up window, the correct related table appears but it does not filter the records to show only the "related" ones. i.e. it just brings up the table with all records. Current workflow: Ensure that feature class and table share the same privileges (SDE) Add data to mxd (feature class and table) - Can confirm that related table is working successfully in ArcMap Publish as service Open in Web Map and enable pop up Display related records - FAILS HERE The related table contains about 2000 records. No warnings or errors are reported in Server Manager. I am successfully created related tables for test datasets using the same workflow so it appears to be something wrong specific to the data. Any help greatly appreciated!

‎06-11-2013

Hi all, Ive come across a problem thats left me scratching my head. Im conducting some analysis which looks at the amount of forested areas that can be seen from hundreds of observer points. In the first instance I ran viewsheds through arcpy and got the total land area of visible forested areas. Cool. But now I need to calculate a measure of the proportion of view that is forested areas. In other words I want to be able to represent (through a value) what someone would be seeing if they were standing at the observer point. It is different to the viewshed as the angle of the visible target relative to the observer needs to be known. For example a forest growing on a cliff side (extreme example I know) would take up a higher proportion of the total viewing angle than forest on a slight slope. In the example below (assuming all visible areas were forested) the observer would have ~100 degrees of visible forest. If only the larger hill was forested they would only have ~30 degrees of visible forest. //http://www.geog.ucsb.edu/~kclarke/G128/images/l13.09 Keep in mind that this sketch is 2D. The viewer can also see 360 degrees laterally and 360 degrees vertically (could be standing on the top of a hill.) Does anyone know of any tools that would be able to calculate this? Sorry if this explanation is a bit rough, let me know if you have any questions. I am comfortable with arcpy and python with access to arcpy 10 and 10.1. Danny

‎02-28-2013

Thank you for the responses. I suspected it might be something as easy as that! It is considerably faster now but I am still only running it on a sample data set. The university I am at has only just upgraded to 10.1 but ill do some investigation and try get SP1 installed. We have access to a super computer which would be nice to take advantage of... Thanks again, Dan

‎02-27-2013

Hi all, Im asking what seems to be a pretty basic question. Ive made a script that iterates through a large number of point features (>1000) and runs a viewshed. It then clips the "visible" areas to different land types so I can calculate the area of different visible land types for each observer point. I have a fairly crude script that works but as you might imagine it is very slow. Looking through ArcGIS help etc I keep coming across RADIUS 1 and RADIUS 2 the second of which would speed up analysis. See here http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//009z000000v8000000.htm Radius 2 sounds like its what I want as it will restrict the viewshed output to a reasonable size. Below is the line of code running the viewshed. How do I define this Radius 2 value? I want it to run so that the viewshed will only be calculated for the area within 5km of each observer point. outViewshed = Viewshed("inRaster", "observor_point", zFactor, useEarthCurvature, refractivityCoefficient) I have access to ArcGIS 10 and 10.1 and a moderate understanding of arcpy. (will only use 10.1 if there is a great feature in it that will speed up this process) Any help most appreciated Cheers! Dan

‎06-20-2012

Thanks for your response Jim, that function will definitely come in handy. However I still have the problem of not being able to use it to calculate the date/time of each point individually as it is added to the map. If I was to put it in now it would say all points were added at the exact same time. Below is the code I have exported straight from modelbuilder. # Import arcpy module import arcpy # Set Geoprocessing environments arcpy.env.scratchWorkspace = "D:\\dnutsford\\Thar_project" arcpy.env.workspace = "G:\\Temp\\Daniel" # Script arguments points = arcpy.GetParameterAsText(0) if points == '#' or not points: points = "in_memory\\{CC1D7814-D71D-4E29-8FB1-3CC188292BF4}" # provide a default value if unspecified output_map = arcpy.GetParameterAsText(1) if output_map == '#' or not output_map: output_map = "D:\\dnutsford\\Thar_project\\output_map" # provide a default value if unspecified # Local variables: # Process: Make Feature Layer arcpy.MakeFeatureLayer_management(points, output_map, "", "", "OBJECTID OBJECTID VISIBLE NONE;SHAPE SHAPE VISIBLE NONE;an an VISIBLE NONE;numba numba VISIBLE NONE") I am adding my points as the first parameter ('points') using a feature set as this allows me to interactively click on the display map. Im thinking that I need some way of iterating through the first parameter so that the script runs automatically each time the user clicks on the map display with the cursor. I can then append all the points to one feature class. Any help with the code required (or if it can be done in modelbuilder even better) would be much appreciated. Cheers Dan

‎06-19-2012

Hi all, I am trying to create a python script (or something of the sorts) that allows me to interactively add points to a .shp or FC by clicking on a map that is updated every X seconds. (This will be done from a helicopter where map updates are based on GPS location). I have been playing around with modelbuilder and feature sets which allows me to add the points interactively, however it stores all the points in the in__memory (I think) then adds them to a FC all at once. I want to be able to append a point to a FC as soon as it is added (i.e. as soon as I click on the map) as each point needs to have a unique timestamp. I have some experience with python, and a little more with modelbuilder. Any help would be awesome! Cheers, Dan

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Date Last Visited	‎11-11-2020 02:23 AM

My Ideas

Latest Contributions by DanielNutsford

DEM Reconditioning Tool Error in ArcPro

Grow Streets only within terrain extent

Related Tables in Portal - Not filtering correct data

Proportion of View

Re: Viewshed Analysis query

Viewshed Analysis query

Re: Dynamically add points to map

Dynamically add points to map

DEM Reconditioning Tool Error in ArcPro