Search results | Digital Grinnell

Title: A Data Set of Annotated Historical Maps
Description: This data set is designed for testing the performance of optical character recognition algorithms on text in scanned historical map images
Date Created: 2013
PID: grinnell:3246

Title: A Data Set of Annotated Historical Maps
Description: This data set is designed for testing the performance of optical character recognition
Date Created: 2017
PID: grinnell:19349

Title: Georeferenced Control Points for Historical Maps
Description: This data set consists of nearly 6,400 control points georeferencing 31 historical maps (1831-1927)
Date Created: 2019
PID: grinnell:23330

Title: Guide to prairie sites near Grinnell, Iowa
Description: The Center for Prairie Studies at Grinnell College has prepared this brochure to help those wishing to visit prairie sites near Grinnell. The prairie blooms from May to October. Different species flower at different times, so repeat visits during a growing season will be rewarded with an ever-changing palette of colors. No two prairies will have the same mix of species.
Date Created: 2004
PID: grinnell:315

Title: Historical Map Annotations for Text Detection and Recognition
Description: This data is set designed for testing the performance of text/graphics separation and character recognition algorithms on text in scanned historical map images. Thirty one maps from the nineteenth and early twentieth centuries (1866–1927) were chosen from nine atlases in the David Rumsey Map Collection (http://davidrumsey.com). Most maps are of individual U.S. states, though some are regional and one is of the entire U.S.; most feature little handwritten text. The original MrSid files are converted into uncompressed TIFF images for a manual annotation, stored in JSON format. The authors gratefully acknowledge the David Rumsey Map Collection as the source of the map images, which come with the following notice: Images copyright © 2000 by Cartography Associates. Images may be reproduced or transmitted, but not for commercial use. This work is licensed under a Creative Commons [Attribution-NonCommercial-ShareAlike 3.0 Unported] license (http://creativecommons.org/licenses/by-nc-sa/3.0). By downloading any images from this site, you agree to the terms of that license.
Date Created: 2018
PID: grinnell:23294