# 시간↔측점 대응표 — 재생 기준을 '시간'에서 '스테이션(측점)'으로 전환하기 위한 색인 구조

<figure>
<svg viewBox="0 0 1080 470" role="img" aria-label="시간↔측점 대응표 도식" font-family="Malgun Gothic, sans-serif">
<defs><marker id="ar" markerWidth="10" markerHeight="10" refX="7" refY="3.5" orient="auto"><path d="M0,0 L7,3.5 L0,7 Z" fill="#7c3aed"/></marker></defs>
<rect x="0" y="0" width="1080" height="470" fill="#ffffff"/>
<!-- 상단: 영상 프레임 -->
<rect x="390" y="30" width="300" height="76" fill="#595959"/>
<text x="540" y="63" text-anchor="middle" font-size="21" font-weight="bold" fill="#ffffff">영상 프레임 (사진 1장)</text>
<text x="540" y="90" text-anchor="middle" font-size="15" fill="#e8e8e8">(번호 + 드론 GPS 기록)</text>
<!-- 좌: 시간 계산 -->
<rect x="110" y="180" width="340" height="80" fill="#2e75b6"/>
<text x="280" y="215" text-anchor="middle" font-size="21" font-weight="bold" fill="#ffffff">프레임번호 ÷ fps = 시간</text>
<text x="280" y="243" text-anchor="middle" font-size="15" fill="#dbe9f7">예: 5760번 ÷ 30 = 192초</text>
<!-- 우: 측점 계산 -->
<rect x="630" y="180" width="340" height="80" fill="#70ad47"/>
<text x="800" y="215" text-anchor="middle" font-size="21" font-weight="bold" fill="#ffffff">GPS → 측점 (선로에 투영)</text>
<text x="800" y="243" text-anchor="middle" font-size="15" fill="#e6f2dc">예: 위도·경도 → 160k130</text>
<!-- 하단: 대응표 완성 -->
<rect x="320" y="340" width="440" height="80" fill="#bf9000"/>
<text x="540" y="375" text-anchor="middle" font-size="21" font-weight="bold" fill="#ffffff">시간 ↔ 측점 대응표 완성!</text>
<text x="540" y="403" text-anchor="middle" font-size="15" fill="#f7ecd0">"192초 = 160k130" 처럼 서로 변환 가능</text>
<!-- 화살표 -->
<line x1="455" y1="106" x2="305" y2="176" stroke="#7c3aed" stroke-width="3" marker-end="url(#ar)"/>
<line x1="625" y1="106" x2="775" y2="176" stroke="#7c3aed" stroke-width="3" marker-end="url(#ar)"/>
<line x1="295" y1="260" x2="445" y2="336" stroke="#7c3aed" stroke-width="3" marker-end="url(#ar)"/>
<line x1="785" y1="260" x2="635" y2="336" stroke="#7c3aed" stroke-width="3" marker-end="url(#ar)"/>
</svg>
</figure>