Latest Contributions by MichaelAlires

‎04-12-2012

I am attempting to limit the travel of most school buses down local streets and other undesired locations without creating barriers. We cannot fully limit travel due to special education buses needing to be able to traverse down the streets should there be student there. I am accomplishing this using network parameters and attributes. I am able to adjust the parameter in the layer properties during a solve at the desktop level. Is there a way during a Python script so that I can make those adjustments and run repeated solves for a fleet or am I stuck doing one at a time and adjusting it manually?

‎03-16-2012

I posted something similar a few months back. It would be great if that Tutorial Data was more openly available. I had no problem finding the PDFs to the tutorials, but searched for quite a while for the data. As I searched for it, in some places it would say that it was on a separate Tutorial Data disc. In other places it would say that it was on the full installation of ArcGIS. It just seems that if you can utilize the tools and extensions necessary for the tutorials then you should be able to access the tutorial data easily.

‎11-18-2011

Some of the help documents say that it is a part of an install option. Other help documents reference it being on a separate Tutorial Data disc. Either way, I just believe it would be useful to have the data available online. The PDFs can be found for the Tutorial Data easily. I suppose I don't know why it wouldn't be available for download. If the user can only really use the data when they have access to the extensions, it would make sense that the data should be open and available while the key to unlock the extension to using it is what gets regulated.

‎11-03-2011

I am trying to track down the tutorial data for Network Analyst and seem to have a bit of a help document run-around. In some instances, it says that the data should be on with the install. In other instances, it seems to say that it is a separate disc. I just suppose that it would be easier if there were just a location that it could be downloaded at. You can download other data for free courses on the website.

‎11-03-2011

Where can I find the network analyst tutorial data? Some pages on the site seem to say that it should be loaded with the install. Others seem to say that it is a separate disc. If I remember previously, it showed up on a complete install on 9.3. But, I cannot find it anywhere on a complete install of 10. Is it a separate disc? If so, what is that disc titled and how can it be acquired? I am trying to get all of the tutorial data for the various extensions but am most concerned about Network Analyst on the short-term.

‎10-06-2011

I am trying to do this programmatically. I have roughly 93,000 street segments and over 10 million GPS data points. So I need someway of generating the cardinal direction as an attribute. Unless there is a better way to attribute the information over.

‎10-06-2011

This question relates to my use of Network Analyst extension, but has an editing component to it. I need to determine the direction of which my street lines were created. What direction is taken from the first edited point to the last? Network Analyst is using a bunch of To and From information to create historical traffic patterns based on the street side edges. However, my Street Centerline was a file from our County government. So, I am not fully sure that they consistently have the lines flowing in the same direction. My eventual use is to compare the direction the street was digitized to determine a To/From direction for the lines. Then attribute my GPS data, with a heading, to the appropriate To/From edge of the line. Any ideas?

‎10-06-2011

This question relates to my use of Network Analyst extension, but has an editing component to it. I need to determine the direction of which my street lines were created. What direction is taken from the first edited point to the last? Network Analyst is using a bunch of To and From information to create historical traffic patterns. However, my Street Centerline was a file from our County government when they were created. So, I am not fully sure that they consistently have the lines flowing in the same direction. My eventual use is to compare the direction the street was digitized to determine a To/From direction for the lines. Then attribute my GPS data, with a heading, to the appropriate To/From edge of the line. Any ideas?

‎10-05-2011

It had to do with the cursors I was creating with SearchCursor, UpdateCursor and InsertCursor. So it wasn't specifically a tool. With this script/tool I was developing, I was trying to prepare some of my speed data collected from GPS units that I had attached to street segments before actually generating the network dataset.

‎10-04-2011

*Update* Should anyone search this in the future, here is what I found: I was deleting my cursors with a finally statement at the very end of my python script. The reason for this was to make sure that the cursors got deleted regardless of what happened. This meant that the memory was maintaining a place for all of that information and was causing the program to crash out. I was creating my own "memory leak". Once I set things up to delete the cursors after they were done being used, the program became much more stable. I had to place all of the while statements using my cursors into individual try/except statements. However, I did notice that the program still crashed if I ran it multiple times without a reboot of my computer which makes me think there is some type of memory leak happening within ArcPy. Once I did the reboot, all problems went away until I ran it multiple times again. I haven't installed any of the 10 service packs (as I am waiting for 3 to be soon released) so hopefully that will be resolved once I update.

‎10-04-2011

I am in the midst of creating the signpost feature class and table. I am inputting each of the edge elements into the non-spatial signpost table. In the future, as I update my street network using the newest County Street Centerline Data, is there a way for me to update those edge attributes? Or am I simply going to be stuck re-editing all of the edge data in that table? I couldn't find any information on it. I know that I can update by geometry on my turns feature class, but that is because it is a spatial table with all of the information necessary and the appropriate geometry associated with it. Please let me know if anyone else has had similar problems and/or a possible solution. Thanks!

‎09-28-2011

It would be great to be able to flush my RAM in the midst of a script to prevent my process from being prematurely cancelled out due to a lack of RAM. I am dealing with a number of cursors and files of rows over 1 million. Any ability to clear out the RAM during the operation would be greatly appreciated.

‎08-12-2011

I believe the culmination of the files is getting larger than 3GB. Although at the end of the script, I delete out all of my temporary files and the remaining files would be less than 3GB. Would it be prudent to delete them earlier on? I have been considering that it could be an issue with workspaces, scratch workspaces and intermediate data. Any thoughts, help or suggestions regarding that? As far as the Network Dataset side of things, I am not actually creating the dataset with this script. I am doing that manually later on. With this script, I am taking the streets that we have GPS data for and averaging the times. Then calculating the streets and hours that don't have times attributed with those average speeds. Finally, it is developing the street profile tables and such for historical traffic data when I build my dataset.

‎08-09-2011

I developed a Python program for development of files necessary for my Network Dataset. I did my testing on a sample dataset (a small fraction of my actual dataset, same schema, etc.) to make sure everything is working as it is supposed to. When I move to utilizing my full dataset with over 92,000 line segments, the program crashes after about 5 to 7 minutes and goes to my finally statement where my cursors are being deleted. If I debug my program using printed arcpy.AddMessage statements, the stopping points have correct syntax and seem to be fine. As I mentioned, when I use my smaller dataset, everything runs smoothly. Anyone had this issue or know of what I could do to avoid it?

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

My Ideas

Latest Contributions by MichaelAlires

Changing Parameter Values for Evalutors Programatically

Re: Provide individual tutorial download for tutorial data

Re: ArcGIS Desktop Extensions Tutorial Data Available Online

ArcGIS Desktop Extensions Tutorial Data Available Online

Network Analyst Tutorial Data

Re: Determining Line Direction for Historical Traffic Data

Determining Line Direction for Historical Traffic Data

Determining/Calculating Line Direction

Re: Python Program Crashes with Larger Dataset

Re: Python Program Crashes with Larger Dataset

Signpost Feature Class and Table

ArcPy in Script Memory Flush

Re: Python Program Crashes with Larger Dataset

Python Program Crashes with Larger Dataset

Re: Provide individual tutorial download for tutor...

ArcPy in Script Memory Flush

ArcGIS Desktop Extensions Tutorial Data Available ...