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How to convert radius in metres to pixels?
If you happen to have the latitude of the place where you are looking to convert the radius to pixels, you can make use of the “Meters per pixel” function described at http://wiki.openstreetmap.org/wiki/Zoom_levels. Here’s my javascript implementation:
How to calculate the radius of an object?
With the circumference of Earth being 40,075 km, you get 0.00000898315 deg/m which you need to multiply with the size of the object (1 m) to get the degrees which you have to add to your coordinate to get a point which intersects with the radius of the circle that you want to draw.
How to resize an image without losing quality?
How to resize an image using GIMP 1 Go to “Image” then to “Scale Image”. Image menu is in the top menu bar and once you hover over it there will be a drop-down menu where you 2 Dialog Box popup for changing the image without losing quality. After you click on “Scale Image” a dialog box will pop up. 3 Optional Step: Switching to Inches.
Why is the resolution of an image so important?
If it’s too big, it can reduce your website’s performance and SEO. The resolution of an image is the size in pixels of its horizontal and vertical edges, usually expressed as something like 6016x4014px. The other important factor is the display size – the number of pixels that the image will occupy on the screen that it’s displayed on.
How to calculate the radius of the planet?
Solving for radius from planet center. Tipler, Paul A.. 1995. Physics For Scientists and Engineers. Worth Publishers. 3rd ed.
How is the size of a pixel calculated?
These values for “m / pixel” are calculated with an Earth radius of 6372.7982 km and hold at the Equator; for other latitudes the values must be multiplied by the cosine (approximately assuming a perfect spheric shape of the geoid) of the latitude. “~ Scale” is only an approximate size comparison and refers to distances on the Equator.
How are the properties of a planet determined?
The remaining properties to be determined are radius and density. To determine the planet radius, the brightness drop of the parent star that occurs during a planetary transit is measured. This brightness drop is directly related to the ratio of the planet radius to the radius of its parent star, as shown in the image below.