SNH has published detailed guidance on the maps – available here
Click on the questions below to view further information.
Whilst every care has been taken in compiling these datasets, errors may occur.
We welcome reports from the public where improvements can be made. Please use the ‘contacts’ page and if your question relates to a specific location, please use the ‘share’ tool within the webmaps, and include the link within your email.
For those with dedicated mapping software on their computers (e.g. ArcGIS) the underlying data is available.
|1||Significant recent accretion||Shorelines which have moved more than 10 metres (or faster than 0.5 metres per year) since the 1970s. Green lines show where shoreline has advanced seawards (e.g. accretion or land-claim) and the bolder the colour the greater then change.|
|2||Significant recent erosion||Shorelines where the tide line has moved more than 10 metres (or faster than 0.5 metres per year) since the 1970s. Red lines show where shoreline has retreated landwards (e.g. erosion) and the bolder the colour the greater then change.|
|3||Change 1970 to Modern||This shows where the shoreline has moved since the 1970s both seawards (e.g. accretion or land-claim with green lines), landwards (e.g. erosion with red lines) and little change (with yellow lines). The bolder the colour the greater the change.|
|4||Change 1890 to 1970||This shows where the shoreline has moved between 1890 and 1970s both seawards (e.g. accretion or land-claim with green lines), landwards (e.g. erosion with red lines) and little change (with yellow lines). The bolder the colour the greater the change.|
|5||MHWS Modern||This shows the Modern or current position of the shoreline. It is made up of the most detailed and updated Ordnance Survey data and other more recent survey data.|
|6||MHWS 1970||This shows the position of the shoreline (Mean High Water Springs) within the Ordnance Survey’s 1970s mapping. Which dates from 1956 to 1995.|
|7||MHWS 1890||This shows the position of the shoreline (High Water Mark of Ordinary Spring Tides) within the Ordnance Survey’s 1890s mapping (OS 2nd Edition, 6 inch, county series). Which dates from 1950s to 1990s.|
|8||Coastal Cells (full cells)||This shows the large coastal cells which are used to group the coastline into areas which are connected to each other (within a cell) or separated by headlands (in other cells).|
|9||Coastal Cells (sub cells)||This shows the smaller coastal sub cells which are used to group the coastline into areas which are more connected to each other (within a cell) or separated by headlands (in other sub cells).|
|10||Golf clubs with erosion problems||This data was collected by Scottish Golf Union is based on a questionnaire of clubs, showing those who said they have experienced erosion.|
|11||Remotely Sensed Data Index||This is an index of detailed height data (i.e. topographic surveys) across the country.|
|12||Local Authorities coastal||This shows the extent of Local Authorities which have a shoreline.|
|13||Coastal defences||This data set was compiled by the project team, based on available data (including aerial imagery) and expert knowledge. Previously no nationally available dataset existed, so the dataset used here is incomplete. However SEPA have plans to undertake this work.|
|14||Potentially Vulnerable Areas for Flooding||Sections of river catchments, where the risk from flooding on society’s assets (houses, businesses etc.) is considered to be significant. Small parts of PVAs may be at risk from flooding, but the whole catchment section is considered together.|
|15||Coastal Type (Hard-Mixed, Soft & Artificial)||A three-fold classification of coastal type, based on aerial photography analysis:
|16||Air Photos||This layer shows aerial photography, which is often less than 5 years old. It is provided by GetMapping under the Scottish Government’s One Scotland Mapping Agreement.|