Ordnance Survey
![Grid square](https://upload.wikimedia.org/wikipedia/commons/c/c8/Ordnance_Survey_1-250000_-_TF.jpg)
Paper maps represent only 5% of the company's annual revenue. It produces digital map data, online route planning and sharing services and mobile apps, plus many other location-based products for business, government and consumers. Ordnance Survey mapping is usually classified as either "large-scale" (in other words, more detailed) or "small-scale". The Survey's large-scale mapping comprises 1:2,500 maps for urban areas and 1:10,000 more generally. (The latter superseded the 1:10,560 "six inches to the mile" scale in the 1950s.) These large scale maps are typically used in professional land-use contexts and were available as sheets until the 1980s, when they were digitised. Small-scale mapping for leisure use includes the 1:25,000 "Explorer" series, the 1:50,000 "Landranger" series and the 1:250,000 road maps. These are still available in traditional sheet form.
Ordnance Survey maps remain in copyright for 50 years after their publication. Some of the Copyright Libraries hold complete or near-complete collections of pre-digital OS mapping. Provided by Wikipedia
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Published: 1924
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Published: 1975
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“...Ordnance Survey of Great Britain...”
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“...Ordnance Survey of Great Britain...”