Open City Model

Open City Model is an initiative to provide open cityGML data for all the buildings in the United States. By combining other open datasets such as USBuildingFootprints together with our own code and algorithms it is our goal to provide 3D geometries for every building in the United States.

This data contains roughly 125 million buildings.

The Data

The data is provided via AWS S3 in the bucket opencitymodel. We include three data formats: gml (CityGML), json (CityJSON), and parquet which are identical in content and purely vary in their structure. Within the folder for a data format each US state has its own folder with all of its files. The files for each US state are futher separated by US county and then partitioned into files of 40k buildings to keep file sizes more manageable. Please note that the GML files are zip compressed to minimize download sizes.

The full path to a single file looks like ..

https://s3.dualstack.us-east-1.amazonaws.com/opencitymodel/<data-version>/<file-format>/<StateName>/<CountyCodeFIPS>/<StateName>-<CountyCodeFIPS>-<FileNumber>.[zip|json]

We also provide some easier to navigate file indexes for each state. If you are familiar with accessing AWS S3 directly then you can simply use the AWS tools to list and download files from the opencitymodel bucket directly.

| State | Files | Size (GML compressed) | Size (JSON) | | ------------ |-------------:| ----------:| -----------:| | Alabama | 102 | 495MB | 2253MB | | Alaska | 31 | 26MB | 122MB | | Arizona | 75 | 552MB | 2555MB | | Arkansas | 88 | 282MB | 1334MB | | California | 342 | 3632MB | 13955MB | | Colorado | 97 | 443MB | 2079MB | | Connecticut | 34 | 246MB | 1116MB | | Delaware | 10 | 72MB | 323MB | | DistrictofColumbia | 5 | 48MB | 195MB | | Florida | 215 | 1573MB | 6924MB | | Georgia | 206 | 771MB | 3574MB | | Hawaii | 10 | 58MB | 262MB | | Idaho | 52 | 161MB | 802MB | | Illinois | 191 | 1025MB | 4758MB | | Indiana | 131 | 616MB | 2920MB | | Iowa | 111 | 365MB | 1750MB | | Kansas | 118 | 268MB | 1371MB | | Kentucky | 139 | 529MB | 2395MB | | Louisiana | 91 | 427MB | 1946MB | | Maine | 29 | 153MB | 683MB | | Maryland | 68 | 535MB | 2284MB | | Massachusetts | 72 | 683MB | 2856MB | | Michigan | 166 | 936MB | 4384MB | | Minnesota | 121 | 563MB | 2649MB | | Mississippi | 93 | 304MB | 1449MB | | Missouri | 149 | 591MB | 2765MB | | Montana | 62 | 134MB | 668MB | | Nebraska | 100 | 192MB | 1002MB | | Nevada | 35 | 238MB | 970MB | | NewHampshire | 20 | 122MB | 539MB | | NewJersey | 77 | 515MB | 2312MB | | NewMexico | 45 | 212MB | 986MB | | NewYork | 170 | 1231MB | 5386MB | | NorthCarolina | 170 | 943MB | 4256MB | | NorthDakota | 55 | 106MB | 531MB | | Ohio | 178 | 1101MB | 5008MB | | Oklahoma | 99 | 396MB | 1899MB | | Oregon | 70 | 417MB | 1911MB | | Pennsylvania | 160 | 1027MB | 4609MB | | RhodeIsland | 11 | 81MB | 343MB | | SouthCarolina | 79 | 440MB | 1964MB | | SouthDakota | 68 | 101MB | 542MB | | Tennessee | 128 | 591MB | 2710MB | | Texas | 424 | 2102MB | 9625MB | | Utah | 45 | 216MB | 995MB | | Vermont | 15 | 70MB | 314MB | | Virginia | 162 | 678MB | 3078MB | | Washington | 101 | 693MB | 2967MB | | WestVirginia | 61 | 186MB | 884MB | | Wisconsin | 123 | 699MB | 3134MB | | Wyoming | 25 | 74MB | 349MB |

Source Datasets

Open City Model is fundamentally a data pipeline. Our goal is simply to piece together the many individual open datasets describing building geo