Did you know that the city of #Vienna has vectorized the 19th century #historical #cadastral #maps for the entire current municipal area and published it as OpenData (CC-BY-SA)?😲 I didn't and only learned just this weekend about it in the context of an invitation to the university of Vienna. So much amazing #hgis data out there to discover. A huge thank you to the Vienna urban archeology as curator of the data 👍 below you see my quick and dirty #qgis rendering https://www.data.gv.at/katalog/dataset/4030d796-0573-4305-86f2-b34e38a86a1d#resources
, the #GIS 
of the Government of #Guadalajara 🇲🇽 done in the last two years of work (Only the new developments)