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Historical Topographic Maps - 14 of 13
Historical Topographic Maps FAQs - 13 Found
Are the HTMC maps the same as Digital Raster Graphics (DRG)?
Is USGS planning to produce a web map service version of of the historical topographic maps for GIS applications?
What map series and scales are included in the HTMC?
Map symbology has changed through the years. Where can I find the symbol key for a particular historical map?
Are metadata available for the historical topo maps?
USGS Spotlight Questions