| RHP11604 | Plan continuing the intended Portenleik road from eastward of Dunrobin to Dunbeath. | 1794 |
| RHP11615 | Plan and elevation of a pier for Portgower, Sutherland | 1808 |
| RHP11682 | Plan of the Sutherland Coast Road from Drummuie (Drumbuy of Rhives) to the Ord of Caithness. | Early 19th century |
| RHP11693 | Plan of intended road from Golspie to Dunbeath. | Late 18th century |
| RHP33159 | Plan of area surrounding Brora Colliery and Brick Works and Clynelish Distillery | [1947] |
| RHP38303 | Ordnance Survey 1 inch map marked to show area of proposed afforestation survey. | nd |
| RHP79425 | Ordnance Survey 6 inch plan (Sutherland, sheet LXXXIX) marked to show farm boundaries | [1944-1955] |
| RHP79434 | Ordnance Survey 6 inch plan (Sutherland, sheet XCVIII) marked to show farm boundaries | [1944-1955] |
| RHP97528 | Ordnance Survey 6 inch plan (Sutherland, sheet LXXXIX) marked to show classification of land | [1944-1954] |
| RHP97529 | Ordnance Survey 6 inch plan (Sutherland, sheet XC) marked to show classification of land, Sutherland | [1944-1954] |
| RHP143400/4/7 | Ordnance Survey 6 inch plan, Sutherland, Sheet NC 90 NW | 1970s-1980s |
| RHP143400/4/9 | Ordnance Survey 6 inch plan, Sutherland, Sheet NC 91 NW | 1970s-1980s |
| RHP143400/5 | Ordnance Survey National Grid Square ND | 1970s-1980s |
| RHP143400/5/2 | Ordnance Survey 6 inch plan, Sutherland, Sheet ND 01 SW | 1970s-1980s |