Contents
What is the sinusoidal projection used for?
Usage. The sinusoidal projection is appropriate for thematic world maps although its use is not recommended. The projection has also been used for maps of continents near the equator, like South America and Africa, centered on their own central meridians.
What does the sinusoidal projection preserve?
A sinusoidal projection shows relative sizes accurately, but distorts shapes and directions. Distortion can be reduced by “interrupting” the map.
What is Modis projection?
The MODIS Flood Map (MCDWD) product uses the geographical linear latitude/longitude projection. This geographical projection consists of 460 non-overlapping land tiles that measure approximately 10°X10°.
What are the advantages and disadvantages of the Robinson projection?
Advantage: The Robinson map projection shows most distances, sizes and shapes accurately. Disadvantage: The Robinson map does have some distortion around the poles and edges. Who uses it? The Robinson is most commonly used by students, teachers, textbooks and atlases.
What property does the Bottomley projection preserve?
It was introduced by Henry Bottomley as an alternative to the Bonne projection to reduce the extent of extreme distortion at the edges and give a more satisfying overall shape.
What band is Modis?
MODIS bands
| Band | Wavelength (nm) | Resolution (m) |
|---|---|---|
| 1 | 620–670 | 250 |
| 2 | 841–876 | 250 |
| 3 | 459–479 | 500 |
| 4 | 545–565 | 500 |
What is Terra and Aqua?
Aqua and Terra MODIS have almost identical relative spectral response, spatial resolution, and dynamic range for each band. However, Terra is in the morning orbit with an equator crossing time of 10:30 am, and Aqua is in the afternoon orbit with equator crossing time of 1:30 pm.
What is the equal-area projection best used for?
The equal-area projection retains the relative size of the area throughout a map. So that means at any given region in a map, an equal-area projection keeps the true size of features. While equal-area projections preserve area, it distorts shape, angles and cannot be conformal.
Which is global sinusoidal projection does MODIS use?
This is a corrected version of SR-ORG:6842, describing the global sinusoidal projection used by many MODIS land products. The projection uses a spherical projection ellipsoid but a WGS84 datum ellipsoid. Not all projection software recognizes the “semi_major” and “semi_minor” arguments to Sinusoidal projections.
Where is the tile coordinate system in DAAC-MODIS?
The tile coordinate system starts at (0,0) (horizontal tile number, vertical tile number) in the upper left corner and proceeds right (horizontal) and downward (vertical). The tile in the bottom right corner is (h35,v17).
What kind of ellipsoid does a sinusoidal projection use?
The projection uses a spherical projection ellipsoid but a WGS84 datum ellipsoid. Not all projection software recognizes the “semi_major” and “semi_minor” arguments to Sinusoidal projections.
What are the coordinates of the MODIS grid?
The Climate Modeling Grid products provide global coverage in a Geographic Latitude and Longitude projection at a resolution of 0.05 degrees (5,600 meters at the equator). The geographic coordinates of the upper-left corner of the upper-left pixel of a MODIS CMG image are -180.00 degrees longitude, 90.00 degrees latitude.