The Miller Horticultural Library houses approximately 500 maps and plans associated with Pacific Northwest gardens. However, for 2/3 of the collection, there was no inventory or means of locating items. To address this, we inventoried the map collection, recording the items’ descriptions, creation information, and locations. We aligned this spreadsheet with the schema for the Library’s archive management system so it could be imported. This will allow the map collection to be searched by element, and for librarians to locate items and generate finding aids. We also created a collection development plan to guide future management of the collection.