Latest Contributions by BenjaminMittler

‎06-18-2014

I'm trying to populate a field with an already defined area but only if the Updat_HYGR variable is = to 'A' i have a column with letters A-D (Updat_HYGR), a Column with areas in sqmi (Sq_Miles) and a new column A_SqMi that i only want populated with the area if the Updat_HYGRP = 'A' i just started using python but my statement looks like this def Reclass(A_SqMi): if (Updat_HYGR == 'A'): return Sq_Miles Reclass(!A_SqMi!) Any help would be appreciated

Re: Display a side profile · ‎06-13-2014

From what it sounds like, you want a profile graph. Go to customize -> Toolbars -> and turn on 3D analyst Make sure the DEM or whatever you are pulling elevation from is set as your target layer. Click the interpolate line button, draw your line, the click the profile graph button. Presto! Hope this is what you needed

‎06-04-2014

I have two LAS datasets, one for all point one just with ground. I am using these two dataset in order to create a tree canopy height raster which in turn will allow me to identify areas where communication towers and Water towers exist. (since they stick out above the canopy and exhibit high values.) I am converting the LAS to multipoint (and then point to raster) in order to create a raster grid containing only 1st return points with the maximum point within each cell becoming the cell value. I have attempted to use LAS dataset to raster but i cant seem to figure out the combination of right settings, every time i run this tool it displays a raster similar to this, no clue why. Thanks for the help. I'd also like to state that i was able to complete this process with other smaller LAS datasets in the past [ATTACH=CONFIG]34334[/ATTACH]

‎06-03-2014

I am having a problem when using LAS to multipoint. When looking at my LAS dataset, points occupy all of the cells which outline the 50 .las files in my LAS dataset. However, when i convert to multipoint, points only occupy the first two columns (about 15 of 50 cells) of my dataset. MY first assumption is that there may be a limit on the number of points when covnerting to multipoint, is this so? [ATTACH=CONFIG]34311[/ATTACH]

‎05-27-2014

Fill is an iterative process meaning once the program has filled all of the sinks it will then check for new sinks that have been created by the process of filling the old sinks and continue to fill in this fashion until all sinks are filled. When you identify sinks it only identifies the first round of sinks which are often smaller sinks subset within larger sinks. It is for this reason that when you run identify sinks it only shows sinks that are a few pixels in size. If you really want to see the larger sinks try running fill with a small z value to rid yourself of the smaller sinks and then run identify sinks on the new grid.

‎05-27-2014

I have a Lidar (.las) dataset and would like to calculate or find the average point spacing of the file. The metadata does have a value but the value is based off of the entire dataset and i am just using a clipped portion which believe to have a higher density of points than the dataset on average. What is the best way to go about doing this?

‎04-23-2014

I have been doing some of the python training from ESRI and i am running into a problem with one of the scripts they are having me use. The script is directly from the training page. From my understanding the reason that this won't work is that mapDoc isnt defined. Is it the training that has an error in it? The script updates layer files for a map. >>> path = r"C:\Users\mittler_b\Desktop\Misc\MapScripting10_0\Maps\\" ... arcpy.env.workspace = path ... sourceLyr = arcpy.mapping.Layer(r"C:\Users\mittler_b\Desktop\Misc\MapScripting10_0\NewParks.lyr") ... for mapdoc in arcpy.ListFiles("*.mxd"): ... print mapDoc ... mxd = arcpy.mapping.MapDocument(path + mapDoc) ... for df in arcpy.mapping.ListDataFrame(mxd): ... updateLyr = arcpy.mapping.ListLayers(mxd, "Parks", df)[0] ... arcpy.mapping.UpdateLayer(df, updateLyr, sourceLyr) ... mxd.save()

‎04-16-2014

I found that for my purpose HEC-GeoRAS was superior in every way. it allows you to draw a polyline shapefile (accompanied with a stream line) and then simply click on an area and it will display a cross-section profile.

‎04-04-2014

Having this same exact problem. Using the HEC-GeoRas 10.2 beta and , HEC-Ras 4.1 Did you ever get it fixed? Help would be appreciated Thank You, Ben

‎04-03-2014

On a further note, i am interested in creating cross section of stream channels using the stream line and the dem i have, are you able to do this in arc hydro?

‎04-03-2014

Can someone briefly explain to me how construct 3D line works. I just ran the process using a DEM and a stream line to attach elevation data to the vector stream line. How does this tool assign elevation data, at what increments? does it just assign 1 mean value for the entire stream? when i looked in the attribute table of the 3D line i didnt see any elevation information

‎03-31-2014

When i put in the password it is telling me that further authentication is required. Did the password change or am i just doing something wrong?

‎02-12-2014

Im assuming that you have a raster DEM to start with. Run Fill, Direction, then Accumulation. From accumulation you can manipulate the raster by changing symbology or using raster calculator (if you have a large range of accumulation Log(10)accumulation will create a much more visible stream network. From here you can reclassify so that areas that aren't in the stream network are given values of NoData and areas within the stream network have a value of 1. (go into symbology and set it to classifications, change the number of classifications to 2 and mess around with the placement until you have found what the classifications capture the stream network). From here you can use the stream to feature. Hope this helps

‎02-12-2014

For a hydrology project i am working on i was given a very detailed contour line file as my set of data to work with. As we know, all of the spatial analyst hydrology tool require a raster set to work with. Since the contour lines are so detailed when i try and use the topo to raster tool it says that their are to many points to convert. For the mean time i have been creating a TIN from my contour lines and then converting this to a raster however, since my initial raster wasnt really a uniform shape when i create the tin it interpolated very large areas which largely skew my hydrology analysis. I know that their is a simplify line tool i could use to possibly use the contour to topo tool but unfortunately my agency doesnt have a license for this. Does anyone have any better way of preserving data while converting my contours to a raster (contours at some points are .5 feet.) Thanks, Ben

‎02-06-2014

So i was able to solve this myself and since ive seen other people have had this problem ill answer despite how simple it was. Just take note that just because you have an extension on in ARCGIS doesnt mean it is on in arc catalog as well...

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Date Last Visited	‎04-03-2024 04:57 PM

My Ideas

Latest Contributions by BenjaminMittler

Field calc help

Re: Display a side profile

Re: LAS to Multipoint

LAS to Multipoint

Re: Finding Sinks with SA Hydrology Tools

Average Point Spacing, LiDAR data.

Python Script From ArcGis Training.

Re: Construct 3D line

Re: HEC-GeoRAS Error: Failed to import RAS file!

Re: Construct 3D line

Construct 3D line

Re: New password for Arc Hydro ftp site - October 1st 2013

Re: stream network is showing as set of points, how to change it to line network ?

Topo to Raster

Re: Extension on :error 010096: There is no Spatial Analyst license current...

Georeferencing LiDAR Point Cloud?

Image Comparison Swiper, AGO popup

Display Order for Filter Dropdown.

Re: Merge feature class records based on a specifi...

Reset Page to initial State