Variations of lot sizes within a block (controlled by a map layer)

NicoleHuerlimann

Hi,

i am currently working on a project and i've run into a problem which i couldn't solve yet.
I was wondering whether you might have any idea, how to handle the following issue:

The base of my project is en existing street network. Now i would like to generate lots. Therefore i created a map layer to control the lot size (lotAreaMin and lotAreaMax).

My problem is, that i have different land use types within a block whose lot sizes differ a lot. There is for example an industrial area with an average lot size of 1000 sqm and a residential area with an average lot size of 500 sqm within the same block. As i realised, CityEngine always takes the value (of the layer map) at the center of gravity of the block. Therefore i cannot model variations within a block. I also made a picture for the better understanding of my problem.

Is it possible to solve that problem by using a python script (which subdivides for example the block along the land use types borders and then generates lots automatically)? Or might there be any other possibility of which i didn't thought yet?

Thanks and best regards,
Nicole

Lot sizes.jpg

CustomizedImageryDemo-ezgif.com-video-to-gif-converter.gif

ElliotHartley1

You don't need to use Python scripts (although I'm sure it could be done).   You can create a function map layer and use the example code in the layer attributes:

attr subDivisionRecursive = true
attr lotAreaMin = 200
attr lotAreaMax = 250
attr lotWidthMin = 15
attr irregularity = 0
attr forceStreetAccess = 1

You also need to ensure that the function map layer covers the area you want, I tend to change the colour from white to blue (for example) and then manually move and resize the map layer so it sits below my city, once done you can switch off the visibility.

Make sure you go to the Block Parameters and use the Attribute Connection Editor to use the values in the Function Map layer as well.

Also try this forum thread where I asked something similar Matthias has kindly included an example!
http://forums.arcgis.com/threads/44423-Map-Layer-Functions?p=144024#post144024

Hope this helps