1 / 25

Maps

Maps. Peterson. Ptolemy. 1100 AD. Mercator 1500s. Sextant to determine latitude. John Harrison Late 1700s. 360° / 24 hours in a day = 15° Earth rotates 15° every hour Keep chronometer on GMT (0°) Compare current sunrise / sunset to tables of sunrise/sunset at Greenwich.

sadie
Download Presentation

Maps

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Maps Peterson

  2. Ptolemy

  3. 1100 AD

  4. Mercator 1500s

  5. Sextant to determine latitude

  6. John Harrison Late 1700s

  7. 360° / 24 hours in a day = 15° Earth rotates 15° every hour Keep chronometer on GMT (0°) Compare current sunrise / sunset to tables of sunrise/sunset at Greenwich. If sunrise at 8 AM. Sunrise at Greenwich at 6 AM Longitude = 30° W

  8. Mollweide Equal-area

  9. 12 inches in a foot 5280 feet in a mile 63,360 inches in a mile RF 1:24,000 How many miles to an inch? 24000/63000 = 0.378 1 in : 0.378 miles RF 1:100,000 How many inches in a mile ? 100,000 / 63,360 = 1.5782 1 in: 1.5782 miles 100 cm in a meter 1000 meters in a KM 100,000 cm in a KM RF 1:24,000 How many KM to a cm? 24000/100,000 = 0.24 1 in : 0.24 KM RF 1:100,000 How many KM to a cm? 100,000 / 100,00 = 1.0 1 cm: 1 KM

  10. GIS

More Related