This layer represents quarries and escarpments and is based on LINZ Topo50 data modified using aerial photography and fieldwork.

Groundwater boreholes are represented by point data with each point having attributes describing location, depth and water levels, if known. Additional attribution characterising aquifer type has been added to the original data for the purposes of this project. The data layer is part of the 'Geology of the Middlemarch area' 1:50 000 dataset covering a part of of East Otago around Middlemarch township.

This georeferenced raster image represents aeromagnetic data for the Middlemarch area depicting total magnetic intensity, reduced to pole, second vertical derivative. The data is part of a geophysical survey undertaken for Glass Earth NZ Ltd. in 2007. The data layer is part of the 'Geology of the Middlemarch area' 1:50 000 dataset covering a part of East Otago around Middlemarch township.

This dataset represents the labels associated with the bathymetry layer and comprises annotation which stores depth to the sea bed, in metres.

Annotation in this layer contains commodity labels for sites in NZL_GNS_GM5_resources_point_50k. The data layer is part of the 'Geology of the Middlemarch area' 1:50 000 dataset covering a part of of East Otago around Middlemarch township.

This dataset represents the labels associated with the geochronology sample points and comprises annotation which stores the age of the sample.

Annotation in this layer contains the mapSymbol for polygon features depicted in NZL_GNS_GM5_geological_units_50k. The data layer is part of the 'Geology of the Middlemarch area' 1:50 000 dataset covering a part of of East Otago around Middlemarch township.

This dataset represents the labels associated with the textural zone isotects and comprises annotation which stores the textural zones designation on either side of the isotect.

This georeferenced raster image depicts Free-air gravity anomalies from data generated by the New Zealand gravity station network in 2015. The data layer is part of the 'Geology of the Middlemarch area' 1:50 000 dataset covering a part of East Otago around Middlemarch township.

The extent and nature of geological faults are represented by line features and described in terms of the exposure, direction of movement, age and activity of the fault and the accuracy with which the fault is located. It complies with the GeoSciML Portrayal standard for ShearDisplacementStructureView and fields required by that standard were populated using the CGI Controlled Vocabulary (2012-11). The data layer is part of the 'Geology of the Middlemarch area' 1:50 000 dataset covering a part of of East Otago around Middlemarch township.