network profile
| bio | website | |
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| location | ||
| age | ||
| visits | member for | 9 months |
| seen | Oct 11 '12 at 13:35 | |
| stats | profile views | 8 |
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Aug 1 |
awarded | Teacher |
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Aug 1 |
revised |
Local Coordinate to Geocentric added 4 characters in body |
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Aug 1 |
comment |
Local Coordinate to Geocentric Ok, updated and I expanded on the reasoning behind the steps. A library called geotrans does the heavy lifting for steps 1 & 2. As for the poles well...that was more of a guess I can't predict what will happen at the North pole. However, the South might work just fine. The issue was with how I was testing the accuracy. I used the extents of the level map to give offsets to apply to a hard coded point you wanted to test with. This is only test code so I didn't want to waste any more company time accounting for a map centered on a pole. |
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Aug 1 |
revised |
Local Coordinate to Geocentric added 31 characters in body |
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Aug 1 |
revised |
Local Coordinate to Geocentric added 31 characters in body |
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Aug 1 |
awarded | Scholar |
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Aug 1 |
accepted | Local Coordinate to Geocentric |
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Aug 1 |
answered | Local Coordinate to Geocentric |
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Jul 31 |
comment |
Local Coordinate to Geocentric Thank you both for taking the time to answer my question, more later. |
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Jul 29 |
awarded | Student |
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Jul 27 |
comment |
Local Coordinate to Geocentric Yes, the forward vector would be north. Upwards would be vertically straight up in the air if that is what you meant by up. |
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Jul 27 |
comment |
Local Coordinate to Geocentric Ultimate question added to the top of the post. I've even included the real values for the map I am using. |
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Jul 27 |
revised |
Local Coordinate to Geocentric added 6 characters in body |
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Jul 27 |
revised |
Local Coordinate to Geocentric added 6 characters in body |
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Jul 27 |
comment |
Local Coordinate to Geocentric Mathematically you can't multiply a 3x1 vector but in programming your math library can, adding a 4th element W that is irrelevant and still return the desired 3x1 vector. I will add an example shortly showing conversion from local space to a point exactly on the prime meridian and equator. |
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Jul 27 |
revised |
Local Coordinate to Geocentric added 6 characters in body |
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Jul 27 |
comment |
Local Coordinate to Geocentric Hi whuber, I've expanded on what I am doing in the original post. |
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Jul 27 |
revised |
Local Coordinate to Geocentric deleted 1 characters in body |
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Jul 27 |
awarded | Editor |
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Jul 27 |
revised |
Local Coordinate to Geocentric added 1106 characters in body |
