Walkability Index - Need help.

[LucyHenriques]

Dear all,

As part of my master thesis, I need to calculate a walkability index of different neighborhoods in Hamburg, Germany composed of:

- Land use mix (entropy index)
- Connectivity, represented by the ratio between the number of true intersections (three or more legs) to the land area of the block group in acres.
- FAR (Retail floor area ratio: the retail building floor area footprint divided by retail land floor area footprint)
- Net Residential Density (the ratio of residential units to the land area devoted to residential use per block group.)

I'm having a hard time calculating the Connectivity and the FAR for my neighborhoods. Can someone help me with these two?

I should generate two maps similar to these here:

https://imgur.com/a/YDBsCta

I'm sorry the legends are in German.

I'm a beginner in ArcGIS. Any help or tutorial would be highly appreciated.

Thanks!

[JorgeRuiz-Valdepena]

Dear Lucy,

I am Jorge Ruiz-Valdepeña an Esri Instructor.

Since you are working on your Thesis, I believe you need documentation rather than here is the answer  

I am sharing several links that will help you to get more insight into how to calculate the "Three-way connectivity".

The sources are from the EPA agency "enviroatlas" and the other from us "Esri" here in Redlands, CA USA. 

There is a Python Script Tool ready for you to download and use to calculate the numbers of connections. the other tool mentioned here is "Kernel Density" from the "Spatial Analyst" Extension and you can use ArcGIS Desktop: ArcMap with any License Level.

Walkability Index

https://www.arcgis.com/home/item.html?id=a04a38573f744034bb0f53ba58a34621

Estimated Intersection Density of Walkable Roads

https://enviroatlas.epa.gov/enviroatlas/DataFactSheets/pdf/Supplemental/Estimatedintersectiondensity...

Pedestrian-Oriented Street Intersection Density

https://enviroatlas.epa.gov/enviroatlas/DataFactSheets/pdf/Supplemental/PedestrianOrientedStreetInte...

Smart Location Mapping

https://www.epa.gov/smartgrowth/smart-location-mapping#SLD

Using spatial analysis to measure city accessibility by intersection density

https://www.esri.com/arcgis-blog/products/arcgis-desktop/analytics/using-spatial-analysis-to-measure...

Line and Junction Connectivity

Given a line feature class two point output feature classes are created showing junctions (the endpoints of lines).

http://www.arcgis.com/home/item.html?id=3fa41b1f8b764879be8f21b4e7ffbabd

I hope this information will point you in the right direction 

Good luck with your research.

chao