| """ |
| Build an interactive HTML map of every optical + thermal parameter. |
| |
| Produces a single self-contained `sikkim_parameters.html` with: |
| - basemaps (Google Satellite + OpenStreetMap, switchable), |
| - a true-colour + false-colour Sentinel-2 reference layer, |
| - every spectral index and LST band as its own toggleable layer, |
| - the Sikkim outline, |
| - a layer-control widget so you can switch parameters on/off. |
| |
| Built directly on `folium` + Earth Engine tile layers (no geemap.foliumap, |
| which has a basemap-init bug on current versions). |
| |
| Run: |
| python visualize.py # writes sikkim_parameters.html |
| python visualize.py --open # also open it in your browser |
| |
| The Earth Engine tile URLs baked into the HTML stay valid for viewing without |
| the viewer needing their own EE login. |
| """ |
|
|
| import argparse |
| import os |
| import webbrowser |
|
|
| import ee |
| import folium |
|
|
| from auth_setup import init_ee |
| from roi import get_sikkim |
| from optical_params import optical_features |
| from thermal_params import thermal_features |
| from terrain_params import terrain_features |
|
|
| HTML_OUT = os.path.join(os.path.dirname(__file__), "sikkim_parameters.html") |
|
|
| |
| NDVI_PAL = ["#a50026", "#d73027", "#f46d43", "#fee08b", |
| "#d9ef8b", "#66bd63", "#1a9850", "#006837"] |
| SNOW_PAL = ["#08306b", "#4292c6", "#9ecae1", "#deebf7", "#ffffff"] |
| WATER_PAL = ["#ffffff", "#9ecae1", "#4292c6", "#08306b"] |
| MOIST_PAL = ["#8c510a", "#d8b365", "#f6e8c3", "#c7eae5", "#5ab4ac", "#01665e"] |
| BARE_PAL = ["#006837", "#ffffbf", "#a6611a", "#7f3b08"] |
| GRAY_PAL = ["#000000", "#ffffff"] |
| LST_PAL = ["#000080", "#0000ff", "#00ffff", "#00ff00", |
| "#ffff00", "#ff8000", "#ff0000", "#800000"] |
| ANOM_PAL = ["#2166ac", "#67a9cf", "#d1e5f0", "#f7f7f7", |
| "#fddbc7", "#ef8a62", "#b2182b"] |
| ELEV_PAL = ["#006837", "#ffffbf", "#a6611a", "#7f3b08", "#ffffff"] |
| SLOPE_PAL = ["#1a9850", "#ffffbf", "#d73027", "#7f0000"] |
| ASPECT_PAL = ["#ff0000", "#ffff00", "#00ff00", "#00ffff", |
| "#0000ff", "#ff00ff", "#ff0000"] |
| CURV_PAL = ["#5e3c99", "#b2abd2", "#f7f7f7", "#fdb863", "#e66101"] |
| RUG_PAL = ["#ffffcc", "#a1dab4", "#41b6c4", "#225ea8", "#0c2c84"] |
| DIFF_PAL = ["#2166ac", "#67a9cf", "#f7f7f7", "#ef8a62", "#b2182b"] |
|
|
| |
| OPTICAL_LAYERS = [ |
| ("NDVI", {"min": -0.2, "max": 0.8, "palette": NDVI_PAL}, "NDVI (vegetation)"), |
| ("NDSI", {"min": -0.5, "max": 1.0, "palette": SNOW_PAL}, "NDSI (snow)"), |
| ("NDWI", {"min": -0.3, "max": 0.5, "palette": WATER_PAL}, "NDWI (water)"), |
| ("NDMI", {"min": -0.4, "max": 0.4, "palette": MOIST_PAL}, "NDMI (moisture)"), |
| ("BSI", {"min": -0.3, "max": 0.4, "palette": BARE_PAL}, "BSI (bare/debris)"), |
| ("ALBEDO", {"min": 0.0, "max": 0.8, "palette": GRAY_PAL}, "Albedo"), |
| ] |
|
|
| THERMAL_LAYERS = [ |
| ("LST_summer", {"min": -10, "max": 30, "palette": LST_PAL}, "LST summer (degC)"), |
| ("LST_winter", {"min": -25, "max": 15, "palette": LST_PAL}, "LST winter (degC)"), |
| ("LST_annual", {"min": -15, "max": 25, "palette": LST_PAL}, "LST annual (degC)"), |
| ("LST_anomaly", {"min": -5, "max": 5, "palette": ANOM_PAL}, "LST anomaly (degC)"), |
| ] |
|
|
| TERRAIN_LAYERS = [ |
| ("ELEV_COP", {"min": 200, "max": 8500, "palette": ELEV_PAL}, "Elevation (Copernicus, m)"), |
| ("DIFF_SRTM_COP", {"min": -30, "max": 30, "palette": DIFF_PAL}, "DEM diff: SRTM - COP (m)"), |
| ("DIFF_NASA_COP", {"min": -30, "max": 30, "palette": DIFF_PAL}, "DEM diff: NASADEM - COP (m)"), |
| ("DIFF_ALOS_COP", {"min": -30, "max": 30, "palette": DIFF_PAL}, "DEM diff: ALOS - COP (m)"), |
| ("SLOPE", {"min": 0, "max": 60, "palette": SLOPE_PAL}, "Slope (deg)"), |
| ("ASPECT", {"min": 0, "max": 360, "palette": ASPECT_PAL}, "Aspect (deg)"), |
| ("HILLSHADE", {"min": 0, "max": 255}, "Hillshade"), |
| ("CURVATURE", {"min": -5, "max": 5, "palette": CURV_PAL}, "Curvature"), |
| ("TRI", {"min": 0, "max": 30, "palette": RUG_PAL}, "TRI (ruggedness)"), |
| ("ROUGHNESS", {"min": 0, "max": 80, "palette": RUG_PAL}, "Roughness (max-min, m)"), |
| ("TPI", {"min": -30, "max": 30, "palette": DIFF_PAL}, "TPI (position index)"), |
| ("REL_RELIEF", {"min": 0, "max": 300, "palette": RUG_PAL}, "Relative relief (m)"), |
| ] |
|
|
|
|
| def add_ee_layer(fmap, ee_image, vis_params, name, show=False): |
| """Attach an Earth Engine image as a folium tile layer.""" |
| map_id = ee.Image(ee_image).getMapId(vis_params) |
| folium.raster_layers.TileLayer( |
| tiles=map_id["tile_fetcher"].url_format, |
| attr="Google Earth Engine", |
| name=name, |
| overlay=True, |
| control=True, |
| show=show, |
| ).add_to(fmap) |
|
|
|
|
| def build_map(): |
| init_ee() |
| geom, fc = get_sikkim() |
|
|
| optical = optical_features(geom) |
| thermal = thermal_features(geom) |
| terrain = terrain_features(geom) |
|
|
| m = folium.Map(location=[27.6, 88.5], zoom_start=9, control_scale=True) |
|
|
| |
| folium.TileLayer( |
| tiles="https://mt1.google.com/vt/lyrs=s&x={x}&y={y}&z={z}", |
| attr="Google", name="Google Satellite", overlay=False, control=True, |
| ).add_to(m) |
| folium.TileLayer("OpenStreetMap", name="OpenStreetMap", |
| overlay=False, control=True).add_to(m) |
|
|
| |
| add_ee_layer(m, optical, {"bands": ["B4", "B3", "B2"], "min": 0.0, "max": 0.3}, |
| "Sentinel-2 true colour", show=True) |
| add_ee_layer(m, optical, {"bands": ["B11", "B8", "B4"], "min": 0.0, "max": 0.4}, |
| "Sentinel-2 false colour (SWIR)", show=False) |
|
|
| |
| for band, vis, label in OPTICAL_LAYERS: |
| add_ee_layer(m, optical.select(band), vis, label, show=False) |
| for band, vis, label in THERMAL_LAYERS: |
| add_ee_layer(m, thermal.select(band), vis, label, show=False) |
| for band, vis, label in TERRAIN_LAYERS: |
| add_ee_layer(m, terrain.select(band), vis, label, show=False) |
|
|
| |
| outline = ee.Image().byte().paint(featureCollection=fc, color=1, width=2) |
| add_ee_layer(m, outline, {"palette": ["#ff00ff"]}, "Sikkim boundary", show=True) |
|
|
| folium.LayerControl(collapsed=False).add_to(m) |
| return m |
|
|
|
|
| def main(): |
| parser = argparse.ArgumentParser(description=__doc__) |
| parser.add_argument("--open", action="store_true", |
| help="Open the HTML in the default browser when done.") |
| args = parser.parse_args() |
|
|
| m = build_map() |
| m.save(HTML_OUT) |
| print(f"Wrote interactive map -> {HTML_OUT}") |
| if args.open: |
| webbrowser.open("file://" + os.path.abspath(HTML_OUT)) |
|
|
|
|
| if __name__ == "__main__": |
| main() |
|
|
