No aggregate is shown if missing data account for more than one third of the observations in the series. Weighted Mean 66: Aggregates are calculated as weighted averages of available data for each time period.
Select an appropriate weight variable (GNI, population, GDP, exports, imports, labor force or land area) from the Weight Indicator box, as shown above.ġ0. Weighted Mean: Aggregates are calculated as weighted averages of available data for each time period. Sums are not shown if more than one third of the observations in the series are missing.ĩ.
Sum 66: Aggregates are calculated as the sum of available data for each time period. Sum: Aggregates are calculated as the sum of available data for each time period.Ĩ. Min: Aggregates are set to the lowest available value for each time period.ħ. Values are not computed if more than a third of the observations in the series are missing.Ħ. Median 66: Aggregates are calculated as the median of available data for each time period. Median: Aggregates are calculated as the median of available data for each time period.ĥ. Values are not shown if more than one third of the observations in the series are missing.Ĥ. Mean 66: Aggregates are calculated as the average of available data for each time period. Mean: Aggregates are calculated as the average of available data for each time period.ģ. Max: Aggregates are set to the highest available value for each time period.Ģ. The reverse projection transforms from the plane back onto the sphere.1. The forward projection transforms spherical coordinates into planar coordinates. In addition it is frequently used in panoramic photography to represent a spherical panoramic image. In particular, the plate carrée has become a standard for global raster datasets, such as Celestia, NASA World Wind, and Natural Earth, because of the particularly simple relationship between the position of an image pixel on the map and its corresponding geographic location on Earth. Because of the distortions introduced by this projection, it has little use in navigation or cadastral mapping and finds its main use in thematic mapping. The projection is neither equal area nor conformal. The projection maps meridians to vertical straight lines of constant spacing (for meridional intervals of constant spacing), and circles of latitude to horizontal straight lines of constant spacing (for constant intervals of parallels). The equirectangular projection (also called the equidistant cylindrical projection or la carte parallélogrammatique projection), and which includes the special case of the plate carrée projection (also called the geographic projection, lat/lon projection, or plane chart), is a simple map projection attributed to Marinus of Tyre, who Ptolemy claims invented the projection about AD 100. True-colour satellite image of Earth in equirectangular projection
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