Bare Land - GF7 Satellite Imagery of Exposed Land in Zhuhai

Published: 2025-03-15 Source: Original article (reproduction prohibited) 18 images • 0.7 m • Gaofen-7

Urban Exposed-Land Monitoring with Satellite Imagery

Satellite imagery plays an important role in urban exposed-land (bare soil / bare land) monitoring. It is an efficient, accurate and economical monitoring method, widely used in urban planning, ecological protection and environmental governance. Its main roles are as follows:

Satellite	Gaofen-7 (GF7) of China — 0.7 m high-resolution optical stereo mapping satellite
Case area	Zhuhai City, Guangdong Province, China — exposed-land imagery captured in 2025
Dataset	18 scenes (Fig. 1–Fig. 18) shown below

1. Rapid large-area coverage

Panoramic surface data over large urban areas on a regular basis; maps the distribution, area and changes of exposed land for environmental management.

2. Precise bare-land identification

High-resolution constellations (GeoEye, WorldView, Gaofen) use multi-band spectral signatures, such as higher red and near-infrared reflectance, to extract bare soil precisely.

3. Land-use change monitoring

Tracks exposed-land dynamics over time — construction, re-greening, waste dumping or erosion — for early warning of illegal occupation and ecological damage.

4. Dust-pollution control

Exposed areas are a major source of urban dust. Real-time monitoring supports mitigation measures such as greening and covering.

5. Re-greening & restoration

Compares multi-temporal imagery to evaluate re-greening effectiveness and vegetation coverage, optimizing restoration projects.

6. Efficiency & transparency

Highly automated remote sensing rapidly produces exposed-land maps, cutting labor costs and providing transparent data for authorities and the public.

About this case: The satellite images below are [exposed-land satellite imagery] of Zhuhai City captured in 2025 by China’s 0.7 m GF7 satellite (Gaofen-7). [To purchase satellite imagery] Please contact the staff of Beijing Yijingtu, or leave us a message online, and click Online Search to view more satellite project cases and samples.

Gallery: 18 GF7 images of exposed land in Zhuhai (2025) — click an image to enlarge. Fig. 1–Fig. 18.