Virtual Earth live maps resolution and scale
The resolution as well as the scale of the maps differs according to the numerous factors such as latitude and longitude of the resolution of the screen. The problem also arises as the planet earth is neither flat not completely spherical; therefore, it is a tough task of deciding the scale as well as the resolution of the maps that you are viewing. Therefore, you must know the factors, which affect them and the method to find the scale as well as the resolution.
Virtual Earth also offers users the Mercator projection, which can solve many problems. The maps offered by it are conformal. In simple language, this means that the scale is continuous. Hence, when we have the “X” scale, we also know the “y” scale easily. The navigation lines are like straight segments. Therefore, when you correct the magnetic indication, you are able to travel along a straight line when browsing through maps. But the Mercator has few problems. Because of the above explained features, the distance between the parallel latitudes as well as the longitudes remain continuous as we navigate along them.
But the actual distance between the parallel longitudes as well as latitudes differ on the globe. Because of this, the imagery of the object appears different from the shape of objects. Therefore, the Mercator makes easy to have understanding of the local maps and to draw them. However, it does not provide users the right scale as well as resolution. Hence, it is significant to measure the scale and the resolution. You are also able to measure the resolution; you need to take the help of a constant value and the latitude, zoom level.
Furthermore, you should express the cosine values in degrees. When you want to express them in degrees then you need to multiply them by Pi/180. When the Mercator projection does not work in the polar region, then this equation is does not work here. This formula also allows users to calculate a scale for zoom levels; however this scale alters along with the altitude. The scale is more expedient as compared to resolution to understand the maps.
The calculation of the scale requires the resolution, the zoom level, and the latitude. In addition, the screen resolution must remain constant for both the x and y directions. You need to convert the resolution in the metric system form the pixels in which it is generally described. Therefore, for practical purposes, you do not need to worry about the resolution and the maps scale. In these cases, you can leave it up to the built in scale of this program and the Microsoft will do the calculations for you. However, you require locating the specific points on the maps and get the distances. For this, it is significant for you to know about how to calculate the scale as well as the resolution.
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