opendata-download-radar

I am not working on this anymore. Maybe in the future.

Status: proof-of-concept, not even alpha

A drop-in proxy service for colorizing grayscale radar imagery from SMHI Öppna API Radar in .tif and converts it to .png.

You can run it in two modes, either serve the imagery in gray-scale but as .png or you can supply a colorscheme that colorizes the imagery for you, still serving you it as .png.

Downloads and colorizes and serves a 887x471 px image in < 100 ms on my laptop.

What is this?

SMHI Open Data API does not support serving unbranded imagery unless you use the .tiff format. This is problematic on platforms such as Android because native image decoders does not support the tiff-format.

This drop-in-replacement allows you to have the same behavior as SMHI's api, but the only difference is that it will serve convert the tiff image into .png-format and serve you it back.

Usage

You can send a request like this to get the .tif image data as .png.

curl -O http://localhost:8000/api/version/latest/area/sweden/product/comp/2019/04/03/radar_1904030005

Storage

The radar images are stored in /data/{year}/{month}/{date}/{filename}.png.

Run

cargo run --release

Build

Build is run in rust:latest image then binary is copied to runtime image opendata-download-radar image.

$ docker build -t opendata-download-radar:latest .

Configuration

Optional colors.ini can be supplied to serve colored images. Otherwise the grayscale image will simply be returned to you in png-format.

Run in docker

You can run the instance via docker:

$ docker run -it --rm -v data:/data sphrak/opendata-download-radar:latest

Versioning

Libraries

• https://docs.rs/image/0.21.0/image/
• https://docs.rs/reqwest/0.9.13/reqwest/
• https://api.rocket.rs/v0.4/rocket/
• https://github.com/shssoichiro/oxipng
• https://github.com/BurntSushi/rust-csv

License

Copyright 2019 Niclas Kron

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

   http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.