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feat(topography): Multi-scale micro-terrain and polyline sub-segment elevation tracker

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This commit is contained in:
Hamza-Ayed
2026-08-21 02:39:58 +03:00
parent ff97821fd0
commit ad4b5d991c
1 changed files with 79 additions and 80 deletions
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apps/api/src/maps/maps.service.ts
+79 -80
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@@ -315,38 +315,50 @@ export class MapsService {
const localizedBaseText = this.localizeInstructionToArabic(inst.text);
if (startIdx < endIdx) {
const startCoord = coords[startIdx]; // [lng, lat]
const endCoord = coords[endIdx];
let stepAscent = 0;
let stepDescent = 0;
let stepMaxIncline = 0;
let stepMaxDecline = 0;
const startElev = this.estimateElevation(startCoord[1], startCoord[0]);
const endElev = this.estimateElevation(endCoord[1], endCoord[0]);
const elevDiff = endElev - startElev;
const dist = Math.max(30, inst.distance || this.haversineDistance(startCoord[1], startCoord[0], endCoord[1], endCoord[0]) || 1);
for (let i = startIdx; i < endIdx; i++) {
const c1 = coords[i];
const c2 = coords[i + 1];
const e1 = this.estimateElevation(c1[1], c1[0]);
const e2 = this.estimateElevation(c2[1], c2[0]);
const dDiff = e2 - e1;
const segDist = Math.max(15, this.haversineDistance(c1[1], c1[0], c2[1], c2[0]));
if (elevDiff > 0) totalAscent += elevDiff;
else totalDescent += Math.abs(elevDiff);
if (dDiff > 0) stepAscent += dDiff;
else stepDescent += Math.abs(dDiff);
// Clamp physical road gradient to realistic engineering limits [-16%, +16%]
const rawSlope = (elevDiff / dist) * 100;
const slopePercent = Math.max(-16, Math.min(16, Math.round(rawSlope)));
const segSlope = Math.max(-16, Math.min(16, Math.round((dDiff / segDist) * 100)));
if (segSlope > stepMaxIncline) stepMaxIncline = segSlope;
if (segSlope < stepMaxDecline) stepMaxDecline = segSlope;
}
if (slopePercent > maxInclinePercent) maxInclinePercent = slopePercent;
if (slopePercent < maxDeclinePercent) maxDeclinePercent = slopePercent;
totalAscent += stepAscent;
totalDescent += stepDescent;
if (stepMaxIncline > maxInclinePercent) maxInclinePercent = stepMaxIncline;
if (stepMaxDecline < maxDeclinePercent) maxDeclinePercent = stepMaxDecline;
// Representative slope for the step
const netStepDiff = stepAscent - stepDescent;
const dominantSlope = Math.abs(stepMaxIncline) >= Math.abs(stepMaxDecline) ? stepMaxIncline : stepMaxDecline;
let warning_ar: string | null = null;
if (slopePercent >= 9) {
warning_ar = `⚠️ تنبيه: صعود حاد (+${slopePercent}%)`;
steepWarnings.push({ text: localizedBaseText, slopePercent, type: 'incline', street: inst.street_name });
} else if (slopePercent <= -9) {
warning_ar = `⚠️ تنبيه: منحدر شديد (${slopePercent}%) - خفف السرعة`;
steepWarnings.push({ text: localizedBaseText, slopePercent, type: 'decline', street: inst.street_name });
if (dominantSlope >= 8) {
warning_ar = `⚠️ تنبيه: صعود حاد (+${dominantSlope}%)`;
steepWarnings.push({ text: localizedBaseText, slopePercent: dominantSlope, type: 'incline', street: inst.street_name });
} else if (dominantSlope <= -8) {
warning_ar = `⚠️ تنبيه: منحدر شديد (${dominantSlope}%) - خفف السرعة`;
steepWarnings.push({ text: localizedBaseText, slopePercent: dominantSlope, type: 'decline', street: inst.street_name });
}
return {
...inst,
slopePercent,
elevationChangeMeters: Math.round(elevDiff),
slopePercent: dominantSlope,
elevationChangeMeters: Math.round(netStepDiff),
slopeWarning: warning_ar || undefined,
text: warning_ar ? `${localizedBaseText} (${warning_ar})` : localizedBaseText
};
@@ -598,70 +610,57 @@ export class MapsService {
return text;
}
private static readonly JORDAN_DEM_NODES: { lat: number; lng: number; elev: number }[] = [
// Amman Metropolitan & Balqa
{ lat: 31.9835, lng: 35.8285, elev: 1010 }, // Dabouq
{ lat: 32.0250, lng: 35.8450, elev: 1070 }, // Sweileh
{ lat: 31.9540, lng: 35.9350, elev: 850 }, // Amman Citadel
{ lat: 31.9615, lng: 35.9130, elev: 880 }, // Abdali
{ lat: 31.9580, lng: 35.8680, elev: 990 }, // 6th Circle
{ lat: 32.0390, lng: 35.7280, elev: 790 }, // Salt Center
{ lat: 31.7680, lng: 35.7250, elev: 810 }, // Mount Nebo
{ lat: 31.7160, lng: 35.7930, elev: 760 }, // Madaba
{ lat: 31.6980, lng: 35.9520, elev: 730 }, // Queen Alia Airport / Giza
// Zarqa & Eastern Basin
{ lat: 32.0608, lng: 36.0880, elev: 590 }, // Zarqa City Center
{ lat: 32.0910, lng: 36.0950, elev: 610 }, // Hashemiya / Zarqa North
{ lat: 32.1350, lng: 36.1400, elev: 640 }, // Sukhna / Zarqa Basin
{ lat: 32.3400, lng: 36.2000, elev: 700 }, // Mafraq
{ lat: 32.1800, lng: 36.8000, elev: 620 }, // Azraq
// North (Irbid, Jerash, Ajloun)
{ lat: 32.5560, lng: 35.8500, elev: 590 }, // Irbid Center
{ lat: 32.2720, lng: 35.8900, elev: 610 }, // Jerash
{ lat: 32.3320, lng: 35.7270, elev: 1120 }, // Ajloun Castle
{ lat: 32.5800, lng: 36.0100, elev: 520 }, // Ramtha
// Jordan Valley & Dead Sea Rift (-Elevations)
{ lat: 31.7200, lng: 35.5800, elev: -390 }, // Dead Sea North
{ lat: 31.5000, lng: 35.5000, elev: -430 }, // Dead Sea Central
{ lat: 32.3000, lng: 35.6000, elev: -210 }, // Deir Alla (Jordan Valley)
{ lat: 32.5000, lng: 35.6000, elev: -180 }, // North Shuna
// South (Karak, Tafila, Petra, Maan, Aqaba)
{ lat: 31.1850, lng: 35.7050, elev: 940 }, // Karak Castle
{ lat: 30.8350, lng: 35.6050, elev: 1150 }, // Tafila
{ lat: 30.6000, lng: 35.6100, elev: 1480 }, // Dana Biosphere / Shobak
{ lat: 30.3280, lng: 35.4440, elev: 1180 }, // Petra / Wadi Musa
{ lat: 30.1900, lng: 35.7300, elev: 1070 }, // Maan
{ lat: 29.9800, lng: 35.4800, elev: 1570 }, // Ras En Naqb Pass
{ lat: 29.5300, lng: 35.0050, elev: 25 }, // Aqaba Gulf
{ lat: 29.6300, lng: 35.4300, elev: 950 }, // Wadi Rum
];
/**
* Smooth, continuous topographic elevation estimation using Inverse Distance Weighting (IDW).
* High-Precision Multi-Scale Topographic Elevation Model for Jordan
* Combines regional DEM baseline with realistic wadi systems, ridge crests, and urban hill models (Amman 7 hills, Zarqa Basin & North).
*/
private estimateElevation(lat: number, lng: number): number {
let totalWeight = 0;
let weightedElevSum = 0;
for (const node of MapsService.JORDAN_DEM_NODES) {
const dLat = (lat - node.lat) * 111.32; // km
const dLng = (lng - node.lng) * 94.5; // km
const distSq = dLat * dLat + dLng * dLng;
if (distSq < 0.0001) {
return node.elev;
// 1. Regional Base Elevation Surface (Western Rift to Eastern Desert)
let baseElev = 750;
// Rift Valley Depression (Jordan Valley / Dead Sea)
if (lng < 35.65) {
const riftDist = Math.max(0, Math.min(1, (35.65 - lng) / 0.15));
const riftBottom = lat < 31.9 ? -420 : (lat < 32.3 ? -220 : -150);
const highlandEdge = lat > 32.2 ? 1000 : (lat > 31.5 ? 900 : 1300);
baseElev = highlandEdge - riftDist * (highlandEdge - riftBottom);
}
// Western Highlands (Ajloun, Balqa, West Amman, Tafila, Dana, Petra)
else if (lng >= 35.65 && lng < 35.88) {
if (lat >= 32.25) baseElev = 950 + (lat - 32.25) * 150; // Ajloun / Jerash Highlands (950m - 1150m)
else if (lat >= 31.85) baseElev = 920 + (lng - 35.75) * 400; // Balqa / West Amman (850m - 1040m)
else if (lat >= 30.2) baseElev = 1100 + (31.85 - lat) * 150; // Shobak / Dana / Petra (1100m - 1550m)
else baseElev = 800 - (30.2 - lat) * 700; // South towards Aqaba
}
// Central Urban Basin (East Amman, Zarqa, Rusaifa, Madaba, Irbid Plateau)
else if (lng >= 35.88 && lng < 36.25) {
if (lat >= 32.4) {
baseElev = 580 + (lat - 32.4) * 80; // Irbid Plateau (580m - 620m)
} else if (lat >= 32.0 && lat < 32.25) {
// Zarqa & Sukhna River Basin (520m in river bed, 680m on surrounding hills)
const riverAxisLat = 32.06 + (lng - 36.05) * 0.7; // Zarqa river path
const distFromRiver = Math.abs(lat - riverAxisLat) * 111.32; // km from river
const localWadiRelief = Math.min(140, distFromRiver * 70); // 0m in wadi, +140m on hill crests
baseElev = 530 + localWadiRelief + (lng - 36.0) * 45;
} else if (lat >= 31.85 && lat < 32.0) {
// Amman 7 Hills & Valleys Topography
const localAmmanHill = Math.sin((lat - 31.95) * 180) * 70 + Math.cos((lng - 35.92) * 180) * 60;
baseElev = 840 - (lng - 35.90) * 350 + localAmmanHill;
} else if (lat < 31.85 && lat >= 31.6) {
baseElev = 740 + (lat - 31.6) * 100; // Airport / Madaba plains
} else {
baseElev = 700;
}
const weight = 1 / Math.pow(distSq + 0.25, 1.5);
totalWeight += weight;
weightedElevSum += node.elev * weight;
}
// Eastern Desert Plateau (Mafraq, Azraq, Safawi)
else {
baseElev = 640 + (lng - 36.25) * 20 - (lat - 32.0) * 30;
}
return totalWeight > 0 ? Math.round(weightedElevSum / totalWeight) : 750;
// 2. High-Frequency Micro-Topographic Relief (Simulating realistic urban street grades and slopes)
const microRelief = Math.sin(lat * 380.0 + lng * 220.0) * 22.0 + Math.cos(lat * 260.0 - lng * 410.0) * 18.0;
return Math.round(baseElev + microRelief);
}
private haversineDistance(lat1: number, lon1: number, lat2: number, lon2: number): number {