Shopping on line can be easy, simple and save you lots of money. It can also take a lot of your time, frustrate you, and result in unwanted purchases. Now the same can be said for regular high street shopping, but with the vast opportunity presented by the Internet it will pay you to spend a few minutes reading this and understanding how to better optimize your Elevation shopping experience:

1. Compare - without doubt the biggest advantage that the Elevation offers shoppers today is the ability to compare thousands of Elevation at a time. This is a great thing, but not necessarily all the time! Too much can be daunting at times so take advantage of the great comparison sites and where possible let them do the hard work for you.

2. Research - if it has been said it will be on the internet. Ignorance is no longer a justifiable reason for buying the wrong thing. Take the time to research in detail everything that you could possible want to know about

3. Testimonials - don't know anybody that has bought a Elevation? Wrong! If the Elevation is good the internet will let you know. Use the Internet as a friend and get testimonials before you buy.

4. Questions - Got a question about Elevation then search the Forums, FAQ's, Blogs etc. Don't be afraid to ask .....

5. Reputation - Never heard of the company selling Elevation? Don't worry, no reason why you should know every company in the world, but you know someone that does! Use the internet to find out what people are saying about Elevation and build up a picture of their reputation for sales, returns, customer service, delivery etc.

6. Returns - still worried that even after all of the above your Elevation wont be what you want? Check out the returns policy. There is so much competition now that someone, somewhere is bound to offer the terms that you are comfortable with.

7. Feedback - happy with your Elevation then let people know, after all you are depending on others people input in your buying decision, so why not give a little back.

8. Security - check for the yellow padlock on the Elevation site before you buy, and the s after http:/ /i.e. https:// = a secure site

9. Contact - got a question about Elevation, or want to leave a comment then check out the sites contact page. Reputable companies have them and respond.

10. Payment - ready to pay for your Elevation, then use your credit card or PayPal! Be aware of companies that don't accept them, there may be genuine reasons but given the huge amount of choice you have when buying online there is no reason at all not to buy via credit card or PayPal.

of the surface of the Earth – approximately 71% of the Earth's surface is covered with water.The elevation of a geographic location (geography) is its height above a fixed reference point, often the above mean sea level. Elevation, or geometric height, is mainly used when referring to points on the Earth's surface, while altitude or geopotential height is used for points above the surface, such as an aircraft in flight or a spacecraft in orbit.

Less commonly, elevation is measured using the center of the Earth as the reference point. Due to equatorial bulge, there is debate whether the summits of Mount Everest or Chimborazo (volcano) are at the higher elevation, as Chimborazo is further from the Earth's center while Mt. Everest is higher above mean sea level.

Maps and GIS A topographic map is the main type of map used to depict elevation, often through use of contour lines.

In a Geographic Information System (GIS), digital elevation models (DEM) are commonly used to represent the surface (topography) of a place, through a raster (grid) dataset of elevations. Digital terrain models are another way to represent terrain in GIS.

To determine elevation of a place, it must be geophysical surveyed, in reference to a ground control point.

of Haleakala (Hawaii), showing elevation.

Topography The elevation of a mountain usually refers to its topographical summit. The elevation of a hill also refers to the summit. A valley's elevation is usually taken from the lowest point but is often taken all over the valley.

See also

• altitude
• geodesy
• geodesy of North America
• Sea Level Datum of 1929 later National Geodetic Vertical Datum of 1929 (NGVD 29)
• North American Vertical Datum of 1988 (NAVD 88)
• List of highest mountains
• List of highest towns by country
• physical geography
• summit (topography)
• topographic isolation
• topographic prominence
• topographical map
• topography

External links

• U.S. National Geodetic Survey website
• Geodetic Glossary @ NGS
• NGVD 29 to NAVD 88 online elevation converter @ NGS
• United States Geological Survey website
• Geographical Survey Institute
• Downloadable ETOPO2 Raw Data Database (2 minute grid)
• Downloadable ETOPO5 Raw Data Database (5 minute grid)
• bivouac.com Canadian Mountain Encyclopedia
• peakbagger.com
• peaklist.org
• peakware.com World Mountain Encyclopedia
• summitpost.org

of the surface of the Earth – approximately 71% of the Earth's surface is covered with water.The elevation of a geographic location (geography) is its height above a fixed reference point, often the above mean sea level. Elevation, or geometric height, is mainly used when referring to points on the Earth's surface, while altitude or geopotential height is used for points above the surface, such as an aircraft in flight or a spacecraft in orbit.

Less commonly, elevation is measured using the center of the Earth as the reference point. Due to equatorial bulge, there is debate whether the summits of Mount Everest or Chimborazo (volcano) are at the higher elevation, as Chimborazo is further from the Earth's center while Mt. Everest is higher above mean sea level.

Maps and GIS A topographic map is the main type of map used to depict elevation, often through use of contour lines.

In a Geographic Information System (GIS), digital elevation models (DEM) are commonly used to represent the surface (topography) of a place, through a raster (grid) dataset of elevations. Digital terrain models are another way to represent terrain in GIS.

To determine elevation of a place, it must be geophysical surveyed, in reference to a ground control point.

of Haleakala (Hawaii), showing elevation.

Topography The elevation of a mountain usually refers to its topographical summit. The elevation of a hill also refers to the summit. A valley's elevation is usually taken from the lowest point but is often taken all over the valley.

See also

• altitude
• geodesy
• geodesy of North America
• Sea Level Datum of 1929 later National Geodetic Vertical Datum of 1929 (NGVD 29)
• North American Vertical Datum of 1988 (NAVD 88)
• List of highest mountains
• List of highest towns by country
• physical geography
• summit (topography)
• topographic isolation
• topographic prominence
• topographical map
• topography

External links

• U.S. National Geodetic Survey website
• Geodetic Glossary @ NGS
• NGVD 29 to NAVD 88 online elevation converter @ NGS
• United States Geological Survey website
• Geographical Survey Institute
• Downloadable ETOPO2 Raw Data Database (2 minute grid)
• Downloadable ETOPO5 Raw Data Database (5 minute grid)
• bivouac.com Canadian Mountain Encyclopedia
• peakbagger.com
• peaklist.org
• peakware.com World Mountain Encyclopedia
• summitpost.org

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