This is a compilations of what I sent to other people.
I have taken it from the cadastre at (https://seduvi.cdmx.gob.mx/programas-delegacionales-de-desarrollo-urbano), I was extremely surprised that CDMX’s cadastre has not being used because it is in the public domain (“Este programa es de carácter público, no es patrocinado ni promovido por partido político alguno y sus recursos provienen de los impuestos que pagan todos los contribuyentes.”) You only need to credit the source: “Agencia Digital de Innovación Pública “Sistema Abierto de Información Geográfica (SIGCDMX)” Disponible en: https://sig.cdmx.gob.mx/”.
After reading osm.wiki/Import/Guidelines, I will make a import page for CDMX data to serve as a documentation for where the data comes from.
Step 1
I download the data from (https://sig.cdmx.gob.mx/datos/descarga). There are two types of data there, the actual cadastry data “Descarga de datos del catastro” and landuse data “Descarga de datos SEDUVI”. The cadastry data is basically a bunch of points and I find that the only useful data there is the address data, which is fairly inaccurate.
It is better to download the landuse data since it has the polygons to work with. I download the shapefile from the “Descarga de datos SEDUVI” section. I’m working at Cuauhtémoc alcadia because it is the central alcadia of CDMX
Generally, since houses in Mexico are connected to each other, often the landuse is the building footprint itself. But, for more complex places like schools, churches, hospital, government areas, etc. it only covers the surrounding of the complex.