The Global Positions System or simply GPS system is a space-based satellite navigation system that provides location and time information in different weather conditions, anywhere on Earth. All that is required is an unobstructed line of sight to four or more GPS satellites. Maintained by the United States, these GPS satellites circle the earth twice each day on a defined orbit and transmit signal information to earth.
How it Works?
Garmin GPS receivers take this information and use triangulation to calculate the user’s exact location. Ideally, a GPS receiver compares the time at which a signal was transmitted by a satellite with the time it was originally received. This time different tells the receiver how far away the satellite is. With the accurate distance measurements from few more satellites, the GPS receiver is able to provide the Garmin GPS system user his or her exact location and displays on the unit or map.
1. The first GPS satellite was launched in 1978
2. A flock of 24 satellites was achieved by 1994
3. Each satellite is built to last about 10 years.
4. Replacements are constantly built and launched in space
5. The approximate weight of a GPS satellite is 2,000 pounds and is 17 feet across with extended solar panels.
6. Transmitter power is only 50 watts or less
Accuracy of GPS
GPS receivers offer high accuracy. With help from their parallel multi-channel design and USB Cable Garmin, these are quick to lock onto satellites and maintain strong connections, despite dense foliage or urban settings with tall buildings.
Other devices commonly used to map out densely populated areas are topographic maps.
If are in a field where use of topographic maps are required to used in high amounts, then you must understand what are topographic maps and most importantly how to read them. Let us first look at the terminology, which defines topo maps.
Topo Maps- these maps are a detailed and three-dimensional representation of accurate and graphical representation of features as they appear on the Earth’s surface. If one has to categorize this geographical representation, then it can be done with following classification.
- Cultural representation on the map encompasses roads, buildings, urban development, railways, airports, name of place, and geographic features etc. It even includes administrative boundaries, state and international borders and reserves.
- Water bodies on the topographic maps come under Hydrography. This includes all types of lakes, rivers, streams, swamps and all coastal flats.
- Reliefs, mountain ranges, valleys, slopes, and other reefs are considered another essential part of the topographic maps.
Topographic maps are commonly used for recreational purposes. For instance, travelling, hiking, and orienteering. Government organizations use these maps for urban planning, mining, emergency management, and deliberating legal boundaries as well as real estate ownership as well. Garmin Topo maps are a mere two to three dimensional representation at a given time. Therefore, it is significant to consider that such maps are not a precise representation.
If you are in search of the best topo maps and Garmin GPS systems, then choose a reputed service provider. In fact, only a reputed supplier, you will find the best and accurate solutions at GPS cable Garmin, handheld GPS devices, and accessories as well.