下列十二份報告是土力工程處於一九七九至一九八五年期間進行全港性岩土工程地區研究計劃的成果。報告包括了本港土地資源的資料，每份報告涵蓋一個指定的地區。報告GASPXII則綜合了其他十一份報告。在編纂這些報告時，作者同時加入香港發展的附加歷史資料，其中大部分是附有註解的照片，因此這些報告也成為重要的歷史文獻。
| 參考 |
名稱 |
| 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) |