The NZ 50k Tile Index dataset provides a 1:50,000 scale base index for larger scale indexes used for aerial imagery and LiDAR datasets. This index is different from [Topo50 Map Sheets]( https://data.linz.govt.nz/layer/50295) in that there are no overlapping index polygons in this dataset. This index also expands further into the sea to support future mapping in coastal areas and encompasses all offshore locations up to 50m in depth. The dataset includes a map sheet code consistent with those from Topo50 Map Sheets, and an attribute for each tile to show whether there is a corresponding Topo50 map sheet with matching location coverage.
The NZ 1:50k Tile Index described in this dataset is the base tile index to which larger scale indexes (1:1k, 1:5k, 1:10k) are related. The larger scale indexes consist of sub-tiles derived from the base NZ 1:50k Tile Index.
The [NZ 1:50k Tile Index](https://data.linz.govt.nz/layer/104687) itself is only partially related to the [NZ LINZ Map Sheets (Topo, 1:50k)] https://data.linz.govt.nz/layer/50295 in that it does not contain overlapping tiles and includes additional tiles in coastal areas. However, both of these use the same tile naming convention.