code wiki / _hdl_build / nx_geo_distance_gate.nx
nx_geo_distance_gate.nx
buildroot/runtime/_hdl_build/nx_geo_distance_gate.nx
about
nx_geo_distance_gate.nx -- GATE for GEO-003 equirectangular distance. Proves on KATs:
1deg latitude ~= 111195 m (the meters-per-degree anchor)
1deg longitude at equator ~= 111195 m
1deg longitude at 60N ~= half of that (cos(60)=0.5 -> longitude-compression in METERS)
same point -> 0
ratio: (1deg lon equator) ~= 2 * (1deg lon at 60N) -> the cos law holds in the distance, too
Tolerances are generous (equirectangular + fixed-point + isqrt rounding); the point is the
capability + the cos compression, not sub-meter accuracy.
Evidence -> knowledge/status/geo_distance.log (GEODISTGATE authored=organ ... verdict=GREEN).
license_tier: ORIGINAL
dependencies 2 imports · 0 importers
imports: nx_geo_distance.nxnx_syscalls.nx
imported by: nobody (leaf or entry point)
call flow from main pre-order; caps 40 nodes / depth 6 declared; ↻ = already shown
structs
| none |
consts
| 15 | const GD_LOG: *u8 = "knowledge/status/geo_distance.log" |
functions
| 17 | func gd_w(fd: i64, s: *u8) -> i64 { var n: i64 = 0; while s[n] != (0 as u8) { n = n + 1 } sys_write(fd, s, n); return 0 } |
| 18 | func gd_wn(fd: i64, v: i64) -> i64 { let bb: *u8 = sys_mmap(28); var m: i64=v; if m<0 {m=0-m; sys_write(fd,"-" as *u8,1)}; let t: *u8 = sys_mmap(28); var k: i64=0; if m==0 {t[0]=48;k=1}; while m>0 {t[k]=(48+(m%10)) as u8; m=m/10; k=k+1}; var i: i64=0; while i<k {bb[i]=t[k-1-i]; i=i+1}; sys_write(fd, bb, k); return 0 } |
| 21 | func gd_near(a: i64, b: i64, tol: i64) -> i64 called by 1: main |
| 28 | func gd_emit(fd: i64, dlat: i64, dlonEq: i64, dlon60: i64, dzero: i64, ok: i64) -> i64 |
| 37 | func main() -> i64 |