Latest Contributions by ChrisDonohue__GISP

‎09-01-2015

Another possibility is to use the Integrate (Data Management) tool: ArcGIS Help (10.2, 10.2.1, and 10.2.2) Also, as mentioned in the tool help, you may want to consider instead a Topology if one of your layers is more accurate than the other. Chris Donohue, GISP

‎08-28-2015

Thanks for the insight Joe. My first thought as other groups within the City discussed what they use the address data for was "are we all talking about the same data set?", as there are a wide variety of uses and expectations, and there is no immediate way to meet all of them. Chris Donohue, GISP

‎08-27-2015

The City I work for (Roseville, California) is in the process of moving around the ownership of several data layers, so I've been asked to get involved with GIS addressing tasks. I have not done addressing before, so wanted to throw out a beginner question - are there standards commonly used for GIS addressing data? I've been told our data has to meet the needs of not just the folks tracking land development and assets, but also the 911 response community (it will eventually feed into a New World CAD system that is in the works). I've heard in the past that the National Emergency Numbers Association (NENA) provides one of the major addressing standards: National Emergency Number Association Is this the predominant standard? Are there others? How does one start getting educated in the GIS side of the addressing standards world? (I suspect this is the realmJoe Borgione lives in). Chris Donohue, GISP

‎08-26-2015

I'll have to have a word with Congress about our state names. Maybe if we renamed them to be more distinctly unique, think of all the money saved and confusion avoided.... Chris Donohue, GISP

‎08-26-2015

Besides Carls' suggestion of scripting, Modelbuilder could also be a means to accomplish your analysis. ArcGIS Help (10.2, 10.2.1, and 10.2.2) It would go something like this: 1. Iterate by record for your facility feature class. Iteration examples: ArcGIS Desktop 2. Select by location the Census polygon your facility is in. 3. Feature to Point of the Census polygon Selection. 4. Run Near Note - you will probably want to use In-line Variable Substitution to name the Near outputs so as to keep them organized. For example, you could have the outputs be named based on the facility ID's. ArcGIS Help (10.2, 10.2.1, and 10.2.2) Chris Donohue, GISP

‎08-26-2015

The map does look cool. I have not used Pro, but I wonder if it has an equivalent of "Service Layer Credits" for imagery and data like they have in ArcGIS (Insert, Dynamic Text, Service Layer Credits). Another avenue to explore would be how Pro allows one to view Metadata. Chris Donohue, GISP

‎08-26-2015

Darren - is there also a way to do wildcards instead of a dictionary? Like if the values to be evaluated can only be state names, so any combination starting with "Wy...." is going to be "Wyoming". This would save having to type out every possible combination people use to abbreviate Wyoming (and other states). Chris Donohue, GISP

‎08-26-2015

Thanks for the code example, Ian. In regards to the new fields, I think Leonard means making a new line for each replacement, not the literal making a new field. For example, having to do this to account for all the possible combinations: !STATE_NAME!.replace("california", "California") !STATE_NAME!.replace("ca", "California") !STATE_NAME!.replace("cal", "California") !STATE_NAME!.replace("cali", "California") etc.... Chris Donohue, GISP

‎08-26-2015

Hmmm, maybe it is time to call in some Python experts: Xander Bakker Dan Patterson Darren Wiens Chris Donohue, GISP

‎08-26-2015

I think if you use the point facilities layer and the centroids, Near would work. Determines the distance from each feature in the input features to the nearest feature in the near features, within the search radius. Near (Analysis) ArcGIS Desktop Chris Donohue, GISP

‎08-26-2015

A quick search revealed this thread regarding Python wildcards. Apparently in Python * is the one for 'one or more characters'. They also mention other ways to do the search that may be usable. http://stackoverflow.com/questions/11427138/python-wildcard-search-in-string Chris Donohue, GISP

‎08-26-2015

Just an idea - I guess part of this could come down to whether one could use wildcards in Python. I don't know the exact answer, but can outline the concept. For example, if you know your data will only include state names expressed in various abbreviations, something like: !STATE_NAME!.replace("ca#", "California") where # is the wildcard allowing unlimited characters after it (whatever the appropriate Python wildcard would be). I'm pretty sure the Python Guru's here on GeoNet would know. I'm curious to see what folks come up with. Chris Donohue, GISP

‎08-26-2015

Another trick to determine connectivity is to run a "New Service Area" with Network Analyst, checking on the "Generate Lines" setting in the "Line Options" tab in the Service Area Properties. Use a very large distance for the "Search Tolerance" on the "Network Locations" tab so lines are generated across your whole dataset if possible. Then check the resulting lines to see where there are disconnects. Chris Donohue, GISP

‎08-25-2015

Some questions to help clarify your request: 1. Is the ultimate goal to make a combined Network Dataset for use in Network Analyst? Or to combine the linework for other uses, like a visual display only? 2. Are the source data files shapefile or a feature classes? What data format are they in? 3. Are the source files projected? 4. What version of ArcGIS do you have? Chris Donohue, GISP

‎08-25-2015

I'd second Darrens' suggestion - what are the map units? And what coordinate system is being used? Also, just as a preventative measure, I would set up a File Geodatabase specifically for this project instead of saving to the ArcGIS default geodatabase. Import the shapefile to this project File Geodatabase. Then export the results here also. This will give you more control over the settings for your data. Chris Donohue, GISP

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Latest Contributions by ChrisDonohue__GISP

Re: Road Layer Polyline Help?

Re: Addressing Standards - getting started

Addressing Standards - getting started

Re: Multiple replacements with Field Calculations using Python

Re: Calculate the distance from pts to polygon centroids

Re: Generate Service Area road network

Re: Multiple replacements with Field Calculations using Python

Re: Multiple replacements with Field Calculations using Python

Re: Multiple replacements with Field Calculations using Python

Re: Calculate the distance from pts to polygon centroids

Re: Multiple replacements with Field Calculations using Python

Re: Multiple replacements with Field Calculations using Python

Re: I have two road networks from differen countries, how do i make intersections?

Re: I have two road networks from differen countries, how do i make intersections?

Re: Issues creating Point Density layer

Re: ArcGIS 10: Graphics won't display in Data View

Re: Can't set output as intermediate data

Re: Addressing - Plus Code or What3Words (W3W)

Re: How to label "_, Mount" as "Mount _" ?

Re: Raster/Vector Land use Analysis

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