Code Editor for app.py

import streamlit as st
import pandas as pd
import numpy as np
import pydeck as pdk

# Mock data
num_food_trucks = 100
np.random.seed(0)
food_truck_locations = pd.DataFrame({
    'latitude': np.random.uniform(40.6, 40.9, num_food_trucks),
    'longitude': np.random.uniform(-74.1, -73.9, num_food_trucks),
})

# Function to generate pedestrian activity heatmap data
def generate_heatmap_data():
    heatmap_data = pd.DataFrame({
        'latitude': np.random.uniform(40.6, 40.9, 500),
        'longitude': np.random.uniform(-74.1, -73.9, 500),
        'intensity': np.random.rand(500) * 100,
    })
    return heatmap_data

heatmap_data = generate_heatmap_data()

# App layout
st.title('Interactive NYC Map Visualization')

# Controls
st.sidebar.header('Controls')
map_style = st.sidebar.selectbox('Map Style', ['street', 'satellite'])
show_food_trucks = st.sidebar.checkbox('Show Food Trucks', value=True)
show_heatmap = st.sidebar.checkbox('Show Pedestrian Heatmap', value=True)

# Time slider
st.sidebar.subheader('Time Controls')
time_frame = st.sidebar.slider('Time frame', min_value=0, max_value=24, value=(0, 24))

# Filter boroughs
boroughs = st.sidebar.multiselect('Select Boroughs', ['Manhattan', 'Brooklyn', 'Queens', 'Bronx', 'Staten Island'], default=['Manhattan', 'Brooklyn'])

# Create deck map with layers
layers = []
if show_food_trucks:
    layers.append(pdk.Layer(
        'ScatterplotLayer',
        data=food_truck_locations,
        get_position='[longitude, latitude]',
        get_fill_color='[255, 0, 0, 200]',
        radius_pixels=100,
        pickable=True,
        line_color='white',
        line_width=2,
        # Popup information
        get_line_color=[0, 0, 0],
        pickable=True,
    ))

if show_heatmap:
    layers.append(pdk.Layer(
        'HeatmapLayer',
        data=heatmap_data,
        get_position='[longitude, latitude]',
        radius_pixels=30,
        threshold=0.1,
        get_weight='intensity',
    ))

# Set view state
view_state = pdk.ViewState(
    latitude=40.7128,
    longitude=-74.0060,
    zoom=12,
    pitch=0,
    bearing=0
)

# Create Map
map = pdk.Deck(
    layers=layers,
    initial_view_state=view_state,
    map_style=map_style.lower(),
    tooltip=True,
)

st.pydeck_chart(map)

# Stats panel
st.sidebar.subheader('Statistics')
if show_food_trucks:
    st.sidebar.markdown(f'**Food Trucks:** {len(food_truck_locations)}')
if show_heatmap:
    st.sidebar.markdown(f'**Pedestrian Heatmap Points:** {len(heatmap_data)}')