下列十二份报告是土力工程处于一九七九至一九八五年期间进行全港性岩土工程地区研究计划的成果。报告包括了本港土地资源的资料，每份报告涵盖一个指定的地区。报告GASPXII则综合了其他十一份报告。在编纂这些报告时，作者同时加入香港发展的附加历史资料，其中大部分是附有注解的照片，因此这些报告也成为重要的历史文献。
| 参考 |
名称 |
| GASP I |
Geotechnical Area Studies Programme - Hong Kong and Kowloon (1987), 170 p. plus 4 maps. (32.2MB) |
| GASP II |
Geotechnical Area Studies Programme - Central New Territories (1987), 165 p. plus 4 maps. (32.2MB) |
| GASP III |
Geotechnical Area Studies Programme - West New Territories (1987), 155 p. plus 4 maps. (29.6MB) |
| GASP IV |
Geotechnical Area Studies Programme - North West New Territories (1987), 120 p. plus 3 maps. (26.5MB) |
| GASP V |
Geotechnical Area Studies Programme - North New Territories (1988), 134 p. plus 3 maps. (28.5MB) |
| GASP VI |
Geotechnical Area Studies Programme - North Lantau (1988), 124 p. plus 3 maps. (22.2MB) |
| GASP VII |
Geotechnical Area Studies Programme - Clear Water Bay (1988), 144 p. plus 4 maps. (23.5MB) |
| GASP VIII |
Geotechnical Area Studies Programme - North East New Territories (1988), 144 p. plus 4 maps. (26.9MB) |
| GASP IX |
Geotechnical Area Studies Programme - East New Territories (1988), 141 p. plus 4 maps. (28.8MB) |
| GASP X |
Geotechnical Area Studies Programme - Islands (1988), 142 p. plus 4 maps. (25.8MB) |
| GASP XI |
Geotechnical Area Studies Programme - South Lantau (1988), 148 p. plus 4 maps. (28.9MB) |
| GASP XII |
Geotechnical Area Studies Programme - Territory of Hong Kong (1989), 346 p. plus 14 maps. (86.9MB) |