This code is used to get images from google maps given a GPS region (lat1, lon1, lat2, lon2) or a center GPS point and a Zoom level.

The code is written in Go and uses the Google Maps Static API to get the images.

This code is used in OpenSatMap (NeurIPS 2024 D&B Track) to collect the data.

Here are the steps to get the images:

1. Install Go. The Go version we used is 1.19.

wget  https://go.dev/dl/go1.19.linux-amd64.tar.gz

rm -rf /usr/local/go && tar -C /usr/local -xzf go1.19.linux-amd64.tar.gz

export PATH=$PATH:/usr/local/go/bin

2. Download some dependencies.

GO111MODULE=off go get github.com/ironsublimate/gomapinfer/common

GO111MODULE=off go get github.com/ironsublimate/gomapinfer/googlemaps

3. Fix the bugs in the code. You should go to path/to/src/github.com/ironsublimate/gomapinfer/googlemaps foloder, modify coords.go, sat.go. Use the following code to fix the bugs. (The case of ironsublimate is changed from upper to lower case.)

import (
        "github.com/ironsublimate/gomapinfer/common"
)

4. Run the code.

mkdir -p ./data/imagery
# get images from a GPS region
GO111MODULE=off go run1_sat.go KEY ./data/imagery
# get images from a GPS center and a zoom level
GO111MODULE=off go run1_sat_center.go KEY ./data/imagery

The code is based on the code from roadtracer. Thanks to the authors for sharing the code.

@article{zhao2024opensatmap,
  title={OpenSatMap: A Fine-grained High-resolution Satellite Dataset for Large-scale Map Construction},
  author={Zhao, Hongbo and Fan, Lue and Chen, Yuntao and Wang, Haochen and Jin, Xiaojuan and Zhang, Yixin and Meng, Gaofeng and Zhang, Zhaoxiang},
  journal={arXiv preprint arXiv:2410.23278},
  year={2024}
}