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import folium
from math import radians, cos, sin, sqrt, atan2
def haversine(lat, lon, distance_km):
# Earth's radius in km
R = 6371.0
# Approximate bounding box (assuming small area, ignoring curvature)
d_lat = distance_km / R
d_lon = distance_km / (R * cos(radians(lat)))
# Top-right coordinates
new_lat = lat + (d_lat * (180 / 3.14159))
new_lon = lon + (d_lon * (180 / 3.14159))
return new_lat, new_lon
def generate_map(bottom_left_lat, bottom_left_lon, distance_km):
top_right_lat, top_right_lon = haversine(bottom_left_lat, bottom_left_lon, distance_km)
# Center of map (approx midpoint)
center_lat = (bottom_left_lat + top_right_lat) / 2
center_lon = (bottom_left_lon + top_right_lon) / 2
# Create a folium map
map_slice = folium.Map(location=[center_lat, center_lon], zoom_start=12)
# Draw a bounding box
folium.Rectangle(
bounds=[(bottom_left_lat, bottom_left_lon), (top_right_lat, top_right_lon)],
color="blue",
fill=True,
fill_opacity=0.2
).add_to(map_slice)
# Save map to file
map_slice.save("map_slice.html")
print("Map saved as 'map_slice.html'. Open it in a browser.")
if __name__ == "__main__":
lat = float(input("Enter bottom-left latitude: "))
lon = float(input("Enter bottom-left longitude: "))
distance_km = float(input("Enter distance (km): "))
generate_map(lat, lon, distance_km)
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