Cityjson schema validator, using Rust & Wasm

NOTE : This project is superseded by the Official CityJSON Validator

Author	Jos Feenstra
Email	me@josfeenstra.nl
Supervisor	Hugo Ledoux

Online

Here

What does it validate

• This web tool validates a given json against the latest cityjson schema.

Design

Why use WebAssembly?

• To gain access some very fast libaries.
• The ability to run the exact same code locally & on the web.

Why use Rust?

• Rust offers fantastic support for wasm with wasm-bindgen, wasm-pack, and the fact that the rust compiler supports wasm straight out of the box.
• Additionally, the design considerations rust is build upon (performance + safety) is a huge potential for geospatial activities.

Why two repo's?

• Decoupling

Both Repo's are created as strip down & pure as possible. This is why typescript, webpack, or web frameworks like react are omitted.

I find it important to show that this is that not only a way of making something on the web fast, but to also showcase how wasm enables interoperability: giving the web the exact same functionality as a local environment, while still remaining separate from it.

I thus opted to create the cityjson-validator-rs completely separate from the web environment, as just a very normal looking, bare-bones rust project.

Installation

git clone https://github.com/josfeenstra/cityjson-validator
cd cityjson-validator

then host the /docs folder using something akin to Live Server or Chrome Live Server. The folder is named /docs due to github pages's hosting conventions...

To build the black box where all the magic happens, /docs/bin, see cityjson-validator-rs

Credits

• Written as a GEO5010 research project for the Msc Geomatics @ Tu Delft