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KJB
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KJB
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interface for low-level NED reader functions More...
Go to the source code of this file.
Namespaces | |
| kjb | |
| Classes and functions for dealing with trajectory files. | |
Enumerations | |
| enum | kjb::NED13_FLOAT_AUTODETECT { kjb::NED_AD_MSBFIRST, kjb::NED_AD_LSBFIRST, kjb::NED_AD_UNCERTAIN } |
Functions | |
| int | kjb::get_ned_fdeq (const std::string &fn, std::deque< float > *odq, bool flip) |
| read the floating-point values of a NED13 file into a deque. More... | |
| int | kjb::get_ned_fdeq (const std::string &fn, std::deque< float > *odq, enum NED13_FLOAT_AUTODETECT byteorder) |
| read the floating-point values of a NED13 file into a deque. More... | |
| int | kjb::ned_fdeq_to_matrix (const std::deque< float > &ibuf, Matrix *omat) |
| convert a deque of floats into a square kjb Matrix More... | |
| int | kjb::get_ned_matrix (const std::string &fn, Matrix *omat, bool flip) |
| read the floating-point values of a NED13 file into a square matrix. More... | |
| int | kjb::get_ned_matrix (const std::string &fn, Matrix *omat, enum NED13_FLOAT_AUTODETECT byteorder) |
| read the floating-point values of a NED13 file into a square matrix. More... | |
| int | kjb::autodetect_ned_byteorder (const std::string &fn, enum NED13_FLOAT_AUTODETECT *result) |
| attempt to determine the byteorder of the input file. More... | |
Variables | |
| const float | kjb::NED_MISSING = -9999.0 |
| sentinel for missing elevation data More... | |
| const float | kjb::NED_MIN = -100 |
| Death Valley is -86 meters elevation. More... | |
| const float | kjb::NED_MAX = 7000 |
| Mt. McKinley is 6194 meters elevation. More... | |
interface for low-level NED reader functions
NED stands for the National Elevation Dataset, which is a family of GIS (Geographical Information Systems) databases of elevation data in the U.S.A., also known as a Digital Elevation Models (DEMs). There are a few NED databases, with different resolutions. The one used by FindTrails is NED13, which has one-third arcsecond resolution. NED13 data is available in grids that are approximately square, with an edge length of just over one degree. As of this writing, a number of such grids are located in /data_3/trails/ned_13as/original.
1.8.6