iwcyou/Shenzhen_SDF

SDF-Guided Multi-modal Big Data Road Extraction

The source code about special session of PAKDD 2025 paper "SDF-Guided Multi-modal Big Data Road Extraction"

Usage

pip install -r requirement.txt # install the dependency library

source tr_sz_sdf.sh # run code

Shenzhen dataset

All of our Shenzhen dataset is based on the web Mercator projection in the GCJ-02 coordinate system.

Each input image image/x_y_sat.png is a RGB satellite image of 1024 $\times$ 1024 pixel size. Its corresponding GPS data is stored in file /GPS/patch/x_y_gps.pkl, and corresponding mask image is mask/x_y_mask.png.

GPS Data

To save the loading time, we publish the dataset in Python's Pickle format, which can be directly loaded like:

import pandas
import pickle
gps_data = pickle.load(open('dataset_sz_sdf/GPS/taxi/0_6_gps.pkl', 'rb'))

Definition of columns:

• id: Vehicle ID (integer)
• time: Timestamp (UNIX format, in second)
• lat: Latitude (in pixel coordinate)
• lon: Longitude (in pixel coordinate)
• direction: Heading (in degree, 0 means the vehicle is heading north or isn't moving)
• speed: Speed (in meter per minute)
• time: The time stamp.

The lat/lon are in the gcj02 System.

Range of sampling

Coordinate Range of satellite images in Nanshan district

wgs84 format：
Top left corner：113.77477269727868, 22.658708423462986
Lower right corner：114.01655951201688, 22.401131313831055

web Mercator on GCJ-02 format：
TLC：12665921.334966816,2590450.8885846175
LRC：12692827.1689232 ,2559417.4551008344

Coordinate Range of road networks in Nanshan district

wgs84 format：
TLC：113.72531536623958, 22.676333371889751640059225977739
LRC：114.07037282840729, 22.352754460489630359940774022261

web Mercator on GCJ-02 format：
TLC：12660417.89499784 , 2592578.6326045664
LRC：12698827.572095804, 2553607.944832368

Coordinate range of train(satellite) ：

wgs84 format:
TLC：113.77477269727868, 22.658708423462986
LRC：114.01655951201688, 22.52994959856712

web Mercator on GCJ-02 format：
TLC：12665921.334966816, 2590450.8885846175
LRC：12692827.1689232 , 2574934.17184272595

Coordinate range of test(satellite) ：

wgs84 format：
TLC：113.77477269727868, 22.52994959856712
LRC：114.01655951201688, 22.465558186041523

web Mercator on GCJ-02 format：
TLC：12665921.334966816, 2574934.17184272595
LRC：12692827.1689232 , 2567175.813471780175

Coordinate range of Nanshan road network (overbold version)：

web Mercator on GCJ-02 format：
TLC：12660417.89499784 , 2592493.9833760057
LRC：12698658.366469823, 2553607.944832368