Latest Contributions by HelenaBreuer

‎01-10-2020

I am trying to determine the sequential order of features along multiple routes. For each route, there is and origin and destination, and they intersect transit stops along the way. I have used Locate Features Along Route, and it output the transit stops in ascending order based on their respective numeric value. I need to get it to output the order it intersects the transit stops from origin to destination. For example, if I manually zoom in on Route X, and it intersects transit stops in the following order: 5, 3, 8 , 9, 2 the output table will sort the attributes based on the value so it will say it intersects in this order: 2, 3, 5, 8, 9. Additionally, I have performed spatial joins between the Routes layer and the layer with the transit stops, with the match option being Intersect and the join type being one to many. The output table sorts it in the same ascneding numeric value order as well. Is there any way I can work around this or is there another tool that I am unaware of that will output the intersecting features in sequential order?

‎12-17-2019

I am running route analysis with the 'Output on Solve' for directions in the route analysis tab. After running, it prompts a window stating "Invalid type for field StreetName in source Streets." In the Streets table, the field 'StreetName' has a data type 'text'. I double checked with the tutorial posted, and the StreetName in the Streets layer has the same data type (text). It should be noted that I am using Public Transit Time as the Time Attribute. Is there any reason why the directions are failing to output?

‎12-05-2019

Is there a way we can program using ArcPy to output these values, or at least see which corresponding transit lines each trip takes (ex. it takes Bus A from Stop X to Stop Y)?

‎11-25-2019

I am using the Route Analysis tool to calculate the transit routes that can be taken for a large set of trips each with unique OD-pairs. Each trip in this data set has a departure/start and arrival/end time. Is there any way I can solve the route analysis under the temporal conditions per trip? I want the route analysis to solve with the departure time being identical to each trip start time... and then it would also output the transit walk and wait time. Any suggestions or work around that would help?

‎11-21-2019

I figured it out - I had to add a clause to the original one in the tutorial. The clause I added said: or RestrictedPedestrians is null.

‎11-21-2019

I ran Connect Network Dataset Transit Sources to Streets and the output created two layers, StopsOnStreets and StopConnectors. I selected "Streets" for my features in the function input, and when I ran the function, the StopOnStreets remain located on LineVariantElements, and all StopConnectors have a length value of 0. It appears that the function is treating the LineVariantElements as the Streets? Because it's producing StopsOnStreets, and all respective StopConnectors. ... any idea of how to fix? or what could have gone wrong? I've attached the function parameters before I run it and two images of the output and attribute table

‎11-21-2019

I have a feature class called Streets, and am copying it to a feature Dataset called GTFSData. I projects Streets to the same reference as GTFSData (WGS84(DD)) I try copying it to the dataset and it keeps giving me an error saying that the spatial reference does not match the output. I checked the differences between each reference and they're the same except for the domain values - I can't change these... is there a way to work around? I'm using Pro 2.4.2.

‎11-19-2019

Thanks for your response Melinda - I only took an introductory class last semester where I learned ArcGIS pro basics, and I am now working with Network Analysis and GTFS, so I am not familiar with the terminology used and implications of specific things. I am working in Pro only because that is what I learned from, although I have ArcMap downloaded - do you think it would be more useful in my case? I still don't know the difference between ArcMap and Pro. My goal is to calculate the walking distance towards and away from transit stops because I first want to see which origins and destinations are within 0.25 mile walking distance - from there I would eliminate all the trips that do not meet that criterion - I have roughly 73.2 million trips so I wanted to use the walking distance only first. Regarding service areas, I thought Generate Service Areas was analogous to solving a service area. My plan is to use the Generate Service Areas tool to create the polygons representing the service areas within 0.25-mile walking distance, then I would perform a spatial join between the trips feature layer and the polygons layer. I would chose within as the parameter, so the output are the trips within 0.25 miles from at least one transit stop. I apologize for any confusion.

‎11-19-2019

Okay - I was watching your Youtube tutorial (lecture 9 - transit enabled network dataset) and saw you added Cincinatti OSM line data to the map prior to executing generate service areas and wasn't sure if I needed to find OSM data for my region of study and do the same.

‎11-19-2019

I am wondering if GTFS and Generate Service Areas tools will be able to achieve what I need... I have a set of data containing X trips with origins (O) and destinations (D) with a start time (ST) and an end time (ET). I am looking to see if a public transit network can serve each individual trip - so the corresponding transit service will need to meet the following criterion: have a bus stop for pick up within 0.25 miles of O have a bus stop for drop off within 0.25 miles of D and the bus stop pick up needs to be within +/5 minutes of ST and the bus stop drop off needs to be within +/- 5 minutes of ET If it meets ALL of the criterion, then we can say that transit could serve that individual trip Whereas if 1+ criteria is not met, then we consider transit to not serve the individual trip We must also consider the number of transit "jumps" needed to complete the trip IF it is considered to be serviced by transit - so if the trip meets all the above criterion, but requires the use of 3 different transit lines, and additional wait time, we need to determine that... but how? Basically what I am trying to find out is: For each individual trip... What are the characteristics of the public transit trip that could serve it? -Wait time -Travel time -Number of transit lines used if needed to switch lets say between the Blue line and Red line -Walking distance from origin to pick up transit stop -Walking distance from drop off transit stop to destination -Trip cost (fare) Are there any tools that can specifically solve this? The dimension of time in ArcGIS tools is what I have the least knowledge about - I am not sure if it can incorporate this into the solver.

‎11-19-2019

I have loaded the GTFS data into ArcGIS, and performed GTFS shapes to features and stops to features. I then created a Service Areas layer Then I added the GTFS shapes to features layer into the Facilities. The only layers I have in my map are: Service Area Trip origins Trip destinations GTFSStops_to_features GTFSShapes_to_features My goal is to see if transit can service the trips - so the origin and destination must lie within 0.25 miles walking distance of transit stops. Can I execute Generate Service Areas with just the facilities loaded? I don't understand how it can calculate a service area with a walking distance impedance with just facilities? Do I need to import a street network in so it knows what paths a pedestrian can walk? Or is there already a pre-loaded universal street network in ArcGIS that it uses?

‎11-19-2019

Thanks Kory - I ended up updating and it fixed alot of the issues!

‎11-14-2019

I have an Excel file that's folder was connected to the Catalog. In that folder I had a file with 4 sheets. I added the 4th sheet to the map via the catalog pane. By default, it became a standalone table, let's call this Table A. This table did not have OIDs so I ran the table to table function, to create a copy of Table A with OIDs, and to change some of the field types from text to doubles (lat/longs in Excel file were text, so I needed them to be doubles to import XY data). Let's call this Table B. I right-clicked Table B in the Contents Pane, and chose Display XY Data I created a new layer with all the data points, let's call this Layer B. I saved the file continuously throughout and worked on it for a few hours after. Later on, I removed Table A, as it was not needed anymore. I saved and closed the program. I just came into work, and when I opened the map, no points from Layer B were displayed on the map - I opened the attribute table and it was empty. I opened Table B, and it was also empty. Is there any reason for this?

‎11-11-2019

Okay great - that is what I was hoping for. So I do not need to add any roads or anything to the service layer? All I have in the service layer is the transit stops under Facilties, nothing else. After I imported those, I edited the travel mode and cut offs, and output geometry. Does the network analysis handle the roads and such on the back end? I was told network analysis is complex and takes a lot of time, although this seems rather easy and simple... just want to make sure I am doing everything correctly.

‎11-11-2019

I am generating service areas with Network Analysis for transit stops (on ArcGIS Pro). I am using Generate Service Areas tool, and using walking as the travel mode and setting it to 0.25 miles- I want to see what region of area lies within 0.25 of traverse-able walking distance. I would like to know, how is this walking distance calculated? Does the walking distance account for non-traverse-able areas? My concern is that the walking distances include buildings, rough terrain, or private areas that a pedestrian cannot walk through to get to the stop - thus the actual walking distance is longer (they have to walk around the building or said private area). If it is not calculated, would I need to import a shp file of Buildings for the study region, then import that into the "Polygon Barriers" layer of the service areas layer? If so, then would the walking distance calculated account for the buildings and restrict the paths from them?

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Date Last Visited	‎11-11-2020 02:24 AM

My Ideas

Latest Contributions by HelenaBreuer

Is it possible to determine the sequential order of features along polyline or route?

Data type to be used in 'StreetName' field in source Streets for Output Directions for Route Analysis?

Re: Using GTFS for trips with specific times of origin and destination

Solving Route Analysis with Unique Start Time per OD-pair

Re: All StopConnectors length value of 0, do not show up on map

All StopConnectors length value of 0, do not show up on map

Can't Copy Feature Class to Feature Dataset even with same spatial reference

Re: Building network of streets for generate service areas

Re: Building network of streets for generate service areas

Using GTFS for trips with specific times of origin and destination

Building network of streets for generate service areas

Re: All attributes deleted from table when re-starting program

All attributes deleted from table when re-starting program

Re: How is the walking distance in Network Analysis calculated?

How is the walking distance in Network Analysis calculated?

Re: All StopConnectors length value of 0, do not s...