Build a Mexico-US example at level 1 for both nations

[sjsrey]

https://github.com/ecv19/geoplanar/tree/main/geoplanar/datasets/mexico

[sjsrey]

The idea is to do a new notebook that works on US counties and Mexico municipios.

• build the combined file
• identify holes/slivers etc with geosnap
• fix any issues using geosnap
• check contiguity between counties and municipios after fixing layer with geosnap

[ecv19]

• Level 2 (counties/municipios) notebook

https://github.com/ecv19/geoplanar/blob/main/notebooks/usmex_level2.ipynb

• Contiguity test

https://github.com/ecv19/geoplanar/blob/main/notebooks/usmex_level2_contiguity.ipynb

[sjsrey]

Develop income data

• mexico muncipios
• us county per capita income

[knaaptime]

The idea is to do a new notebook that works on US counties and Mexico municipios.

• build the combined file
• identify holes/slivers etc with geosnap
• fix any issues using geosnap
• check contiguity between counties and municipios after fixing layer with geosnap

I think we swap geosnap with geonplanar here?