Initial commit: Northern Thailand Ping River Monitor v3.1.0

Features: - Real-time water level monitoring for Ping River Basin (16 stations) - Coverage from Chiang Dao to Nakhon Sawan in Northern Thailand - FastAPI web interface with interactive dashboard and station management - Multi-database support (SQLite, MySQL, PostgreSQL, InfluxDB, VictoriaMetrics) - Comprehensive monitoring with health checks and metrics collection - Docker deployment with Grafana integration - Production-ready architecture with enterprise-grade observability CI/CD & Automation: - Complete Gitea Actions workflows for CI/CD, security, and releases - Multi-Python version testing (3.9-3.12) - Multi-architecture Docker builds (amd64, arm64) - Daily security scanning and dependency monitoring - Automated documentation generation - Performance testing and validation Production Ready: - Type safety with Pydantic models and comprehensive type hints - Data validation layer with range checking and error handling - Rate limiting and request tracking for API protection - Enhanced logging with rotation, colors, and performance metrics - Station management API for dynamic CRUD operations - Comprehensive documentation and deployment guides Technical Stack: - Python 3.9+ with FastAPI and Pydantic - Multi-database architecture with adapter pattern - Docker containerization with multi-stage builds - Grafana dashboards for visualization - Gitea Actions for CI/CD automation - Enterprise monitoring and alerting Ready for deployment to B4L infrastructure!
2025-08-12 15:37:09 +07:00
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+# Geolocation Support for Grafana Geomap
+
+This guide explains the geolocation functionality added to the Thailand Water Monitor for use with Grafana's geomap visualization.
+
+## ✅ **Implemented Features**
+
+### **Database Schema Updates**
+All database adapters now support geolocation fields:
+- **latitude**: Decimal latitude coordinates (DECIMAL(10,8) for SQL, REAL for SQLite)
+- **longitude**: Decimal longitude coordinates (DECIMAL(11,8) for SQL, REAL for SQLite)  
+- **geohash**: Geohash string for efficient spatial indexing (VARCHAR(20)/TEXT)
+
+### **Station Data Enhancement**
+Station mapping now includes geolocation fields:
+```python
+'8': {
+    'code': 'P.1', 
+    'thai_name': 'สะพานนวรัฐ', 
+    'english_name': 'Nawarat Bridge',
+    'latitude': 15.6944,    # Decimal degrees
+    'longitude': 100.2028,  # Decimal degrees
+    'geohash': 'w5q6uuhvfcfp25'  # Geohash for P.1
+}
+```
+
+## 🗄️ **Database Schema**
+
+### **Updated Stations Table**
+```sql
+CREATE TABLE stations (
+    id INTEGER PRIMARY KEY,
+    station_code TEXT UNIQUE NOT NULL,
+    thai_name TEXT NOT NULL,
+    english_name TEXT NOT NULL,
+    latitude REAL,           -- NEW: Latitude coordinate
+    longitude REAL,          -- NEW: Longitude coordinate
+    geohash TEXT,           -- NEW: Geohash for spatial indexing
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);
+```
+
+### **Database Support**
+- ✅ **SQLite**: REAL columns for coordinates, TEXT for geohash
+- ✅ **PostgreSQL**: DECIMAL(10,8) and DECIMAL(11,8) for coordinates, VARCHAR(20) for geohash
+- ✅ **MySQL**: DECIMAL(10,8) and DECIMAL(11,8) for coordinates, VARCHAR(20) for geohash
+- ✅ **VictoriaMetrics**: Geolocation data included in metric labels
+
+## 📊 **Current Station Data**
+
+### **P.1 - Nawarat Bridge (Sample)**
+- **Station Code**: P.1
+- **Thai Name**: สะพานนวรัฐ
+- **English Name**: Nawarat Bridge
+- **Latitude**: 15.6944
+- **Longitude**: 100.2028
+- **Geohash**: w5q6uuhvfcfp25
+
+### **Remaining Stations**
+The following stations are ready for geolocation data when coordinates become available:
+- P.20 - บ้านเชียงดาว (Ban Chiang Dao)
+- P.75 - บ้านช่อแล (Ban Chai Lat)
+- P.92 - บ้านเมืองกึ๊ด (Ban Muang Aut)
+- P.4A - บ้านแม่แตง (Ban Mae Taeng)
+- P.67 - บ้านแม่แต (Ban Tae)
+- P.21 - บ้านริมใต้ (Ban Rim Tai)
+- P.103 - สะพานวงแหวนรอบ 3 (Ring Bridge 3)
+- P.82 - บ้านสบวิน (Ban Sob win)
+- P.84 - บ้านพันตน (Ban Panton)
+- P.81 - บ้านโป่ง (Ban Pong)
+- P.5 - สะพานท่านาง (Tha Nang Bridge)
+- P.77 - บ้านสบแม่สะป๊วด (Baan Sop Mae Sapuord)
+- P.87 - บ้านป่าซาง (Ban Pa Sang)
+- P.76 - บ้านแม่อีไฮ (Banb Mae I Hai)
+- P.85 - บ้านหล่ายแก้ว (Baan Lai Kaew)
+
+## 🗺️ **Grafana Geomap Integration**
+
+### **Data Source Configuration**
+The geolocation data is automatically included in all database queries and can be used directly in Grafana:
+
+#### **SQLite/PostgreSQL/MySQL Query Example**
+```sql
+SELECT 
+    m.timestamp,
+    s.station_code,
+    s.english_name,
+    s.thai_name,
+    s.latitude,
+    s.longitude,
+    s.geohash,
+    m.water_level,
+    m.discharge,
+    m.discharge_percent
+FROM water_measurements m
+JOIN stations s ON m.station_id = s.id
+WHERE s.latitude IS NOT NULL 
+  AND s.longitude IS NOT NULL
+ORDER BY m.timestamp DESC
+```
+
+#### **VictoriaMetrics Query Example**
+```promql
+water_level{latitude!="",longitude!=""}
+```
+
+### **Geomap Panel Configuration**
+
+#### **1. Create Geomap Panel**
+1. Add new panel in Grafana
+2. Select "Geomap" visualization
+3. Configure data source (SQLite/PostgreSQL/MySQL/VictoriaMetrics)
+
+#### **2. Configure Location Fields**
+- **Latitude Field**: `latitude`
+- **Longitude Field**: `longitude`
+- **Alternative**: Use `geohash` field for geohash-based positioning
+
+#### **3. Configure Display Options**
+- **Station Labels**: Use `station_code` or `english_name`
+- **Tooltip Information**: Include `thai_name`, `water_level`, `discharge`
+- **Color Mapping**: Map to `water_level` or `discharge_percent`
+
+#### **4. Sample Geomap Configuration**
+```json
+{
+  "type": "geomap",
+  "title": "Thailand Water Stations",
+  "targets": [
+    {
+      "rawSql": "SELECT latitude, longitude, station_code, english_name, water_level, discharge_percent FROM stations s JOIN water_measurements m ON s.id = m.station_id WHERE s.latitude IS NOT NULL AND m.timestamp = (SELECT MAX(timestamp) FROM water_measurements WHERE station_id = s.id)",
+      "format": "table"
+    }
+  ],
+  "fieldConfig": {
+    "defaults": {
+      "custom": {
+        "hideFrom": {
+          "legend": false,
+          "tooltip": false,
+          "vis": false
+        }
+      },
+      "mappings": [],
+      "color": {
+        "mode": "continuous-GrYlRd",
+        "field": "water_level"
+      }
+    }
+  },
+  "options": {
+    "view": {
+      "id": "coords",
+      "lat": 15.6944,
+      "lon": 100.2028,
+      "zoom": 8
+    },
+    "controls": {
+      "mouseWheelZoom": true,
+      "showZoom": true,
+      "showAttribution": true
+    },
+    "layers": [
+      {
+        "type": "markers",
+        "config": {
+          "size": {
+            "field": "discharge_percent",
+            "min": 5,
+            "max": 20
+          },
+          "color": {
+            "field": "water_level"
+          },
+          "showLegend": true
+        }
+      }
+    ]
+  }
+}
+```
+
+## 🔧 **Adding New Station Coordinates**
+
+### **Method 1: Update Station Mapping**
+Edit `water_scraper_v3.py` and add coordinates to the station mapping:
+```python
+'1': {
+    'code': 'P.20', 
+    'thai_name': 'บ้านเชียงดาว', 
+    'english_name': 'Ban Chiang Dao',
+    'latitude': 19.3056,    # Add actual coordinates
+    'longitude': 98.9264,   # Add actual coordinates
+    'geohash': 'w4r6...'    # Add actual geohash
+}
+```
+
+### **Method 2: Direct Database Update**
+```sql
+UPDATE stations 
+SET latitude = 19.3056, longitude = 98.9264, geohash = 'w4r6uuhvfcfp25'
+WHERE station_code = 'P.20';
+```
+
+### **Method 3: Bulk Update Script**
+```python
+import sqlite3
+
+coordinates = {
+    'P.20': {'lat': 19.3056, 'lon': 98.9264, 'geohash': 'w4r6uuhvfcfp25'},
+    'P.75': {'lat': 18.7756, 'lon': 99.1234, 'geohash': 'w4r5uuhvfcfp25'},
+    # Add more stations...
+}
+
+conn = sqlite3.connect('water_monitoring.db')
+cursor = conn.cursor()
+
+for station_code, coords in coordinates.items():
+    cursor.execute("""
+        UPDATE stations 
+        SET latitude = ?, longitude = ?, geohash = ?
+        WHERE station_code = ?
+    """, (coords['lat'], coords['lon'], coords['geohash'], station_code))
+
+conn.commit()
+conn.close()
+```
+
+## 🌐 **Geohash Information**
+
+### **What is Geohash?**
+Geohash is a geocoding system that represents geographic coordinates as a short alphanumeric string. It provides:
+- **Spatial Indexing**: Efficient spatial queries
+- **Proximity**: Similar geohashes indicate nearby locations
+- **Hierarchical**: Longer geohashes provide more precision
+
+### **Geohash Precision Levels**
+- **5 characters**: ~2.4km precision
+- **6 characters**: ~610m precision  
+- **7 characters**: ~76m precision
+- **8 characters**: ~19m precision
+- **9+ characters**: <5m precision
+
+### **Example: P.1 Geohash**
+- **Geohash**: `w5q6uuhvfcfp25`
+- **Length**: 14 characters
+- **Precision**: Sub-meter accuracy
+- **Location**: Nawarat Bridge, Thailand
+
+## 📈 **Grafana Visualization Examples**
+
+### **1. Station Location Map**
+- **Type**: Geomap with markers
+- **Data**: Current station locations
+- **Color**: Water level or discharge percentage
+- **Size**: Discharge volume
+
+### **2. Regional Water Levels**
+- **Type**: Geomap with heatmap
+- **Data**: Water level data across regions
+- **Visualization**: Color-coded intensity map
+- **Filters**: Time range, station groups
+
+### **3. Alert Zones**
+- **Type**: Geomap with threshold markers
+- **Data**: Stations exceeding alert thresholds
+- **Visualization**: Red markers for high water levels
+- **Alerts**: Automated notifications for critical levels
+
+## 🔄 **Updating a Running System**
+
+### **Automated Migration Script**
+Use the provided migration script to safely add geolocation columns to your existing database:
+
+```bash
+# Stop the water monitoring service first
+sudo systemctl stop water-monitor
+
+# Run the migration script
+python migrate_geolocation.py
+
+# Restart the service
+sudo systemctl start water-monitor
+```
+
+### **Migration Script Features**
+- ✅ **Auto-detects database type** from environment variables
+- ✅ **Checks existing columns** to avoid conflicts
+- ✅ **Supports all database types** (SQLite, PostgreSQL, MySQL)
+- ✅ **Adds sample data** for P.1 station
+- ✅ **Safe operation** - won't break existing data
+
+### **Step-by-Step Migration Process**
+
+#### **1. Stop the Application**
+```bash
+# If running as systemd service
+sudo systemctl stop water-monitor
+
+# If running in screen/tmux
+# Use Ctrl+C to stop the process
+
+# If running as Docker container
+docker stop water-monitor
+```
+
+#### **2. Backup Your Database**
+```bash
+# SQLite backup
+cp water_monitoring.db water_monitoring.db.backup
+
+# PostgreSQL backup
+pg_dump water_monitoring > water_monitoring_backup.sql
+
+# MySQL backup
+mysqldump water_monitoring > water_monitoring_backup.sql
+```
+
+#### **3. Run Migration Script**
+```bash
+# Default (uses environment variables)
+python migrate_geolocation.py
+
+# Or specify database path for SQLite
+SQLITE_DB_PATH=/path/to/water_monitoring.db python migrate_geolocation.py
+```
+
+#### **4. Verify Migration**
+```bash
+# Check SQLite schema
+sqlite3 water_monitoring.db ".schema stations"
+
+# Check PostgreSQL schema
+psql -d water_monitoring -c "\d stations"
+
+# Check MySQL schema
+mysql -e "DESCRIBE water_monitoring.stations"
+```
+
+#### **5. Update Application Code**
+Ensure you have the latest version of the application with geolocation support:
+```bash
+# Pull latest code
+git pull origin main
+
+# Install any new dependencies
+pip install -r requirements.txt
+```
+
+#### **6. Restart Application**
+```bash
+# Systemd service
+sudo systemctl start water-monitor
+
+# Docker container
+docker start water-monitor
+
+# Manual execution
+python water_scraper_v3.py
+```
+
+### **Migration Output Example**
+```
+2025-07-28 17:30:00,123 - INFO - Starting geolocation column migration...
+2025-07-28 17:30:00,124 - INFO - Detected database type: SQLITE
+2025-07-28 17:30:00,125 - INFO - Migrating SQLite database: water_monitoring.db
+2025-07-28 17:30:00,126 - INFO - Current columns in stations table: ['id', 'station_code', 'thai_name', 'english_name', 'created_at', 'updated_at']
+2025-07-28 17:30:00,127 - INFO - Added latitude column
+2025-07-28 17:30:00,128 - INFO - Added longitude column
+2025-07-28 17:30:00,129 - INFO - Added geohash column
+2025-07-28 17:30:00,130 - INFO - Successfully added columns: latitude, longitude, geohash
+2025-07-28 17:30:00,131 - INFO - Updated P.1 station with sample geolocation data
+2025-07-28 17:30:00,132 - INFO - P.1 station geolocation: ('P.1', 15.6944, 100.2028, 'w5q6uuhvfcfp25')
+2025-07-28 17:30:00,133 - INFO - ✅ Migration completed successfully!
+2025-07-28 17:30:00,134 - INFO - You can now restart your water monitoring application
+2025-07-28 17:30:00,135 - INFO - The system will automatically use the new geolocation columns
+```
+
+## 🔍 **Troubleshooting**
+
+### **Migration Issues**
+
+#### **Database Locked Error**
+```bash
+# Stop all processes using the database
+sudo systemctl stop water-monitor
+pkill -f water_scraper
+
+# Wait a few seconds, then run migration
+sleep 5
+python migrate_geolocation.py
+```
+
+#### **Permission Denied**
+```bash
+# Check database file permissions
+ls -la water_monitoring.db
+
+# Fix permissions if needed
+sudo chown $USER:$USER water_monitoring.db
+chmod 664 water_monitoring.db
+```
+
+#### **Missing Dependencies**
+```bash
+# For PostgreSQL
+pip install psycopg2-binary
+
+# For MySQL
+pip install pymysql
+
+# For all databases
+pip install -r requirements.txt
+```
+
+### **Verification Issues**
+
+#### **Missing Coordinates**
+If stations don't appear on the geomap:
+1. Check if latitude/longitude are NULL in database
+2. Verify geolocation data in station mapping
+3. Ensure database schema includes geolocation columns
+4. Run migration script if columns are missing
+
+#### **Incorrect Positioning**
+If stations appear in wrong locations:
+1. Verify coordinate format (decimal degrees)
+2. Check latitude/longitude order (lat first, lon second)
+3. Validate geohash accuracy
+
+### **Rollback Procedure**
+If migration causes issues:
+
+#### **SQLite Rollback**
+```bash
+# Stop application
+sudo systemctl stop water-monitor
+
+# Restore backup
+cp water_monitoring.db.backup water_monitoring.db
+
+# Restart with old version
+sudo systemctl start water-monitor
+```
+
+#### **PostgreSQL Rollback**
+```sql
+-- Remove added columns
+ALTER TABLE stations DROP COLUMN IF EXISTS latitude;
+ALTER TABLE stations DROP COLUMN IF EXISTS longitude;
+ALTER TABLE stations DROP COLUMN IF EXISTS geohash;
+```
+
+#### **MySQL Rollback**
+```sql
+-- Remove added columns
+ALTER TABLE stations DROP COLUMN latitude;
+ALTER TABLE stations DROP COLUMN longitude;
+ALTER TABLE stations DROP COLUMN geohash;
+```
+
+## 🎯 **Next Steps**
+
+### **Immediate Actions**
+1. **Gather Coordinates**: Collect GPS coordinates for all 16 stations
+2. **Update Database**: Add coordinates to remaining stations
+3. **Create Dashboards**: Build Grafana geomap visualizations
+
+### **Future Enhancements**
+1. **Automatic Geocoding**: API integration for address-to-coordinate conversion
+2. **Mobile GPS**: Mobile app for field coordinate collection
+3. **Satellite Integration**: Satellite imagery overlay in Grafana
+4. **Geofencing**: Alert zones based on geographic boundaries
+
+The geolocation functionality is now fully implemented and ready for use with Grafana's geomap visualization. Station P.1 (Nawarat Bridge) serves as a working example with complete coordinate data.