A telecommunications company is planning to launch a new mobile network across a country with varying terrain and population densities. They need to determine the optimal number of cell towers to install, considering signal strength, coverage area, and infrastructure costs. Describe a method for collecting data on existing networks, topographical features, and user preferences to calculate the required number of cell towers and their strategic placement.

1. Data collection on existing networks:
   a. Obtain data from regulatory authorities or industry associations about the number of existing cell towers, their locations, and coverage areas.
   b. Collect information on the types of technologies used by other mobile network operators (e.g., 4G, 5G) and their respective signal strengths.
   c. Analyze network performance metrics such as call drop rates, data speeds, and customer satisfaction ratings to understand the current state of service quality.

2. Topographical features data collection:
   a. Gather geographical data on the country's terrain, including elevation, landforms, and natural barriers that may affect signal propagation.
   b. Obtain climate data, such as average rainfall, temperature, and humidity levels, which can impact radio wave transmission.
   c. Use satellite imagery and GIS tools to map out urban, suburban, and rural population densities across the country.

3. User preferences data collection:
   a. Conduct surveys among potential customers to gauge their expectations for network coverage, signal strength, and pricing.
   b. Analyze social media sentiment and online reviews of existing mobile network providers to identify common pain points and desired improvements.
   c. Study demographic trends and market research reports to forecast future demand for mobile services in different regions.

4. Calculation of required number of cell towers and strategic placement:
   a. Use mathematical models and optimization algorithms to determine the optimal number of cell towers needed to provide adequate coverage and signal strength while minimizing infrastructure costs.
   b. Consider factors such as population density, topography, and user preferences when determining the ideal locations for each tower.
   c. Perform simulations using software tools to test various scenarios and refine the placement strategy based on the results.

5. Validation and refinement:
   a. Validate the proposed cell tower deployment plan with local stakeholders, including government agencies, community leaders, and environmental groups.
   b. Make necessary adjustments to the plan based on feedback and regulatory requirements.
   c. Monitor network performance after tower installation to ensure that coverage, signal strength, and user satisfaction targets are met. Adjust the plan as needed for future expansions or upgrades.