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<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Flood Vulnerability Assessment</title>
<link rel="stylesheet" href="/static/css/styles.css">
</head>
<body>
<div class="hero-background"></div>
<div class="page-wrapper">
<header class="hero-header" style="position: relative; padding-top: 40px; text-align: center;">
<div style="display: inline-block; text-align: center; max-width: 90%; margin: 0 auto;">
<h1 style="margin: 0; font-size: 3rem; line-height: 1.2;">
Flood Vulnerability Assessment
</h1>
<p class="subtitle" style="margin: 0.2rem 0 0 0; font-size: 1rem; line-height: 1.2;">
Global building-level assessment
</p>
</div>
</header>
<div style="max-width:900px;margin:1rem auto;padding:0.75rem 1rem;background:#fff3cd;border-left:4px solid #e6a817;border-radius:4px;font-size:0.85rem;color:#5a4000;line-height:1.5;">
<strong>Disclaimer:</strong> GFVM is a research tool that provides terrain‑based flood vulnerability estimates for informational purposes only. Outputs represent approximate indications of relative flood vulnerability and are not a substitute for professional engineering assessments, official flood maps, regulatory determinations, or local risk surveys.
Use of this tool is at your own risk. Nazarbayev University and the authors accept no liability for any decisions, damages, or losses resulting from the use or interpretation of these outputs.
</div>
<div class="main-container">
<!-- Side Navigation -->
<aside class="side-nav">
<div class="nav-card">
<h3>Assessment Tools</h3>
<button class="nav-link active" onclick="switchTab('basic')">Basic Assessment</button>
<button class="nav-link" onclick="switchTab('explained')">Detailed Explanation</button>
<button class="nav-link" onclick="switchTab('multihazard')">Multi-Hazard Analysis</button>
<button class="nav-link" onclick="switchTab('batch')">Batch Processing</button>
<button class="nav-link" onclick="switchTab('about')">About & Methodology</button>
</div>
</aside>
<!-- Content Area -->
<main class="content-area">
<!-- Basic Assessment -->
<div id="basic-card" class="assessment-card active">
<div class="card-header">
<h2>Basic Assessment</h2>
<p>Quick vulnerability analysis for a single location</p>
</div>
<form onsubmit="assessLocation(event, '/assess', 'basic-results')">
<div class="form-grid">
<div class="input-card">
<label for="latitude">Latitude</label>
<input type="text" id="latitude" name="latitude" inputmode="text"
pattern="-?[0-9]*[.,]?[0-9]*" required placeholder="40.7128" list="lat-suggestions">
<p class="helper-text">Range: -90 to 90</p>
</div>
<div class="input-card">
<label for="longitude">Longitude</label>
<input type="text" id="longitude" name="longitude" inputmode="text"
pattern="-?[0-9]*[.,]?[0-9]*" autocomplete="off" required placeholder="-74.0060"
list="lon-suggestions">
<p class="helper-text">Range: -180 to 180</p>
</div>
<div class="input-card">
<label for="height">Building Height</label>
<div class="height-group">
<input type="number" id="height" step="any" value="0" placeholder="5.0">
<button type="button" class="gba-height-btn tooltip-btn" data-lat-id="latitude"
data-lon-id="longitude" data-height-id="height" data-error-id="basic-error"
data-tooltip="The height is from Global Buildings Atlas.">
Get Height (GBA)
</button>
</div>
<button type="button" class="predict-height-btn secondary-btn-style tooltip-btn"
data-lat-id="latitude" data-lon-id="longitude" data-height-id="height"
data-error-id="basic-error"
data-tooltip="Uses the DL model to predict the building height, trained on Barcelona, Paris, Astana, and Vienna.">
Predict Height
</button>
<p class="helper-text">
Meters above ground (0 = ground level)
</p>
</div>
<div class="input-card">
<label for="basement">Basement Depth</label>
<input type="text" id="basement" name="basement" value="0" max="0" inputmode="text"
pattern="-?[0-9]*[.,]?[0-9]*" placeholder="-2.0">
<p class="helper-text">Meters below ground (negative values)</p>
</div>
</div>
<div class="action-section">
<button type="submit" class="primary-button">Analyze Location</button>
</div>
</form>
<div class="loading-state" id="basic-loading">
<div class="loading-spinner"></div>
<p>Analyzing terrain and water proximity...</p>
</div>
<div class="error-message" id="basic-error"></div>
<div class="results-section" id="basic-results"></div>
</div>
<!-- Explained Assessment -->
<div id="explained-card" class="assessment-card">
<div class="card-header">
<h2>Detailed Explanation</h2>
<p>Get comprehensive risk factor analysis with SHAP explanations</p>
</div>
<form onsubmit="assessLocation(event, '/explain', 'explained-results')">
<div class="form-grid">
<div class="input-card">
<label for="latitude2">Latitude</label>
<input type="text" id="latitude2" name="latitude2" pattern="-?[0-9]*[.,]?[0-9]*"
autocomplete="off" required placeholder="40.7128" list="lat-suggestions">
</div>
<div class="input-card">
<label for="longitude2">Longitude</label>
<input type="text" id="longitude2" name="longitude2" pattern="-?[0-9]*[.,]?[0-9]*"
autocomplete="off" required placeholder="-74.0060" list="lon-suggestions">
</div>
<div class="input-card">
<label for="height2">Building Height</label>
<div class="height-group">
<input type="number" id="height2" step="any" value="0">
<button type="button" class="gba-height-btn tooltip-btn" data-lat-id="latitude2"
data-lon-id="longitude2" data-height-id="height2"
data-error-id="explained-error"
data-tooltip="The height is from Global Buildings Atlas.">
Get Height (GBA)
</button>
</div>
<button type="button" class="predict-height-btn secondary-btn-style tooltip-btn"
data-lat-id="latitude2" data-lon-id="longitude2" data-height-id="height2"
data-error-id="explained-error"
data-tooltip="Uses the DL model to predict the building height, trained on Barcelona, Paris, Astana, and Vienna.">
Predict Height
</button>
<p class="helper-text">Meters above ground</p>
</div>
<div class="input-card">
<label for="basement2">Basement Depth</label>
<input type="text" id="basement2" name="basement2" inputmode="text"
pattern="-?[0-9]*[.,]?[0-9]*" step="0.1" value="0" max="0">
<p class="helper-text">Meters below ground (negative)</p>
</div>
</div>
<div class="action-section">
<button type="submit" class="primary-button">Analyze with Explanation</button>
</div>
</form>
<div class="loading-state" id="explained-loading">
<div class="loading-spinner"></div>
<p>Analyzing and generating explanation...</p>
</div>
<div class="error-message" id="explained-error"></div>
<div class="results-section" id="explained-results"></div>
</div>
<!-- Multi-Hazard Assessment -->
<div id="multihazard-card" class="assessment-card">
<div class="card-header">
<h2>Multi-Hazard Analysis</h2>
<p>Comprehensive assessment across fluvial, coastal, and pluvial hazards</p>
</div>
<form onsubmit="assessLocation(event, '/assess_multihazard', 'multihazard-results')">
<div class="form-grid">
<div class="input-card">
<label for="latitude3">Latitude</label>
<input type="text" id="latitude3" name="latitude3" pattern="-?[0-9]*[.,]?[0-9]*"
autocomplete="off" required placeholder="40.7128" list="lat-suggestions">
</div>
<div class="input-card">
<label for="longitude3">Longitude</label>
<input type="text" id="longitude3" name="longitude3" pattern="-?[0-9]*[.,]?[0-9]*"
autocomplete="off" required placeholder="-74.0060" list="lon-suggestions">
</div>
<div class="input-card">
<label for="height3">Building Height</label>
<div class="height-group">
<input type="number" id="height3" step="any" value="0">
<button type="button" class="gba-height-btn tooltip-btn" data-lat-id="latitude3"
data-lon-id="longitude3" data-height-id="height3"
data-error-id="multihazard-error"
data-tooltip="The height is from Global Buildings Atlas.">
Get Height (GBA)
</button>
</div>
<button type="button" class="predict-height-btn secondary-btn-style tooltip-btn"
data-lat-id="latitude3" data-lon-id="longitude3" data-height-id="height3"
data-error-id="multihazard-error"
data-tooltip="Uses the DL model to predict the building height, trained on Barcelona, Paris, Astana, and Vienna.">
Predict Height
</button>
<p class="helper-text">Meters above ground</p>
</div>
<div class="input-card">
<label for="basement3">Basement Depth</label>
<input type="text" id="basement3" name="basement3" inputmode="text"
pattern="-?[0-9]*[.,]?[0-9]*" step="0.1" value="0" max="0">
<p class="helper-text">Meters below ground (negative)</p>
</div>
</div>
<div class="action-section">
<button type="submit" class="primary-button">Run Multi-Hazard Analysis</button>
</div>
</form>
<div class="loading-state" id="multihazard-loading">
<div class="loading-spinner"></div>
<p>Analyzing multiple flood hazards...</p>
</div>
<div class="error-message" id="multihazard-error"></div>
<div class="results-section" id="multihazard-results"></div>
</div>
<!-- Batch Processing -->
<div id="batch-card" class="assessment-card">
<div class="card-header">
<h2>Batch Processing</h2>
<p>Upload a CSV file to assess multiple locations simultaneously</p>
</div>
<div class="form-grid">
<div class="input-card">
<label for="batchMode">Analysis Mode</label>
<select id="batchMode">
<option value="standard">Basic Assessment Model</option>
<option value="multihazard">Multi-Hazard Analysis</option>
</select>
<p class="helper-text">Choose the assessment type for batch processing</p>
</div>
<div class="input-card">
<label for="csvFile">CSV File</label>
<input type="file" id="csvFile" accept=".csv">
<p class="helper-text">Required columns: latitude, longitude in decimal degrees (e.g. 29.17,
-95.31). Optional: height(meters), basement (should be negative).</p>
</div>
</div>
<div class="input-card" style="margin-top: 1.5rem;">
<label for="heightSource">Building Height Source</label>
<select id="heightSource">
<option value="csv">Use height from CSV (default)</option>
<option value="gba">Use height from Global Buildings Atlas (GBA)</option>
<option value="predicted">Use DL-predicted building height</option>
</select>
<p class="helper-text">
Choose how to obtain building height for each row in the vulnerability assessment.
</p>
</div>
<div class="action-section">
<button class="primary-button" onclick="uploadBatch()">Process Batch</button>
</div>
<div class="loading-state" id="batch-loading">
<div class="loading-spinner"></div>
<p>Processing batch assessments...</p>
</div>
<div class="error-message" id="batch-error"></div>
<div class="results-section" id="batch-results"></div>
</div>
<div id="about-card" class="assessment-card">
<div class="card-header">
<h2>About & Methodology</h2>
<p>Model description, limitations, and citation</p>
</div>
<div style="line-height:1.7;font-size:0.95rem;">
<h3 style="margin-top:0;">Model Description</h3>
<p>The Global Flood Vulnerability Model (GFVM) generates building-level flood vulnerability indices derived from multi-source remote sensing and terrain analysis. Outputs represent modeled estimates subject to data resolution limits, temporal lags, classification uncertainty, and methodological assumptions.</p>
<h3>Limitations</h3>
<p>GFVM outputs do not replace official government flood hazard maps, site-specific hydrological or hydraulic assessments, insurance determinations, emergency planning instruments, or qualified professional advice. The developers and Nazarbayev University bear no responsibility or liability for property, financial, legal, or safety decisions made based on use of this tool.</p>
<h3>Citation</h3>
<p>Olagunju, S. O., Sharipova, A., Serikkyzy, A., Satybaldiyeva, D., Varol, H. A., & Karaca, F. (2026). Global flood vulnerability model: Building-level assessment using multi-source remote sensing. <em>Remote Sensing</em>, <em>18</em>(9), 1425. <a href="https://doi.org/10.3390/rs18091425" target="_blank" rel="noopener" style="color:#ffffff;">https://doi.org/10.3390/rs18091425</a></p>
</div>
</div>
</main>
</div>
<footer>
GFVM © 2026 | Developed at Nazarbayev University | Published in <em>Remote Sensing</em> | For research and informational use only | No liability accepted
</footer>
</div>
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