
Transparency & Accountability Initiative Grants Database
Includes funding from Ford, Hewlett, Luminate, MacArthur, OpenSocietyFoundation, and Chandler foundations totaling over half a billion dollars
CityGML is an open data model and XML-based format for the storage and exchange of virtual 3D city models.
CityGML is an open data model and XML-based format for the storage and exchange of virtual 3D city models. It is an application schema for the Geography Markup Language version 3.1.1 (GML3), the extendible international standard for spatial data exchange issued by the Open Geospatial Consortium (OGC) and the ISO TC211. The aim of the development of CityGML is to reach a common definition of the basic entities, attributes, and relations of a 3D city model. This is especially important with respect to the cost-effective sustainable maintenance of 3D city models, allowing the reuse of the same data in different application fields.
Stagnant or on pause
Parent organization: Open Geospatial Consortium


Includes funding from Ford, Hewlett, Luminate, MacArthur, OpenSocietyFoundation, and Chandler foundations totaling over half a billion dollars
MDS standardizes communication and data-sharing between cities and private mobility providers, such as e-scooter and bike-share companies.

Use this free tool from JustFix to research your building and investigate landlords! We use property ownership mapping to identify a landlord's portfolio

HXL is a different kind of data standard, designed to improve information sharing during a humanitarian crisis without adding extra reporting burdens.