Magellan GTDR anomalies

# Created by Gerard Gallardo i Peres# ---------------------------------------------------------#### ----------------------------------------------------------# Author: Gerard Gallardo i Peres / Imperial College London, isardSAT## Reviewers: Dr. Philippa J. Mason / Prof. Richard C. Ghail################################################################################### ####### ####### ##################################### ########## ############### ##################################### ########## ############### ##################################### ########## ############### ################################# ####### ####### ################################################################################################### This dataset contains maps of the potential anomalies and low quality pixels of the GTDR volume mg_3002 and the GTDR volume mg_3003. Each of these maps shows the anomalies and associated variables in Mercator and Sinusoidal projection, generated and projected from/as described in: https://pds-geosciences.wustl.edu/mgn/mgn-v-gxdr-v1/mg_3002/document/gxdr.txt The map files are all in GeoTIFF format and are projected using the 1985 COSPAR Venus reference ellipsoid (https://epsg.io/104901). They are embedded with the complete georeferencing metadata (coordinate reference system, geotransform, and spatial extent) to facilitate their direct use in GIS software. The _anomaly maps show the location of the potential anomalies, with pixel values equal to -99999. The _lq_pixels maps show the location of the potential anomalies and their surrounding 'low quality' neighbours, with pixel values equal to -99999. These are overlain on top of the corresponding GTDR topography, given as values of elevation above the reference radius value of the product R = 6039999 m. Pixel values equal to 0 correspond to data gaps from the original GTDR products or to pixels outside the projection area. *Note: we recommend using the Mercator 3003 version of the files as the standard/reference one.