... good point! Comment from steve beyatte(@steveb): @rajiv_ayyangar @terrence_kelleman this is fun. Most (all?) US cities have PIM info that could be scraped easily. Here's San Francisco's: https://sfplanninggis.org/pim/ . You could also look at @Esri 's APIs here: https://www.esri.com/en-us/arcgi... which have tons of options. Specific info like roof angles might be tough but general form and size I bet could either scrape or find in ESRI