Module 7 Blog: Google Earth – Dot Density Map and Tour

 Module 7 Blog: Google Earth – Dot Density Map and Tour

This lab focused on using Google Earth to create and present geographic data in an interactive and visually engaging way. The main objectives were to convert ArcGIS layers into KMZ files, build an interactive map, and create a recorded tour highlighting major cities in South Florida. These tasks reinforced how GIS data can be shared with a broader audience using tools that do not require specialized GIS software.

For my map, I created a dot density visualization of population across southern Florida, where each dot represents 10,000 people. This layer was displayed along with hydrography features symbolized by category and county boundaries that include pop-up attribute information. I also added a legend as an image overlay to ensure the map was easy to interpret. The goal was to clearly communicate population distribution while still allowing other important geographic features to remain visible.

To create the final deliverables, I first converted the necessary ArcGIS layers into KMZ format using the Layer to KML tool. After importing the data into Google Earth Pro, I organized the layers into a structured folder and ensured that the population dots were displayed above other features. I then added a legend overlay and adjusted the map to show all 23 counties at the default extent. Once the map was complete, I saved it as a KMZ file for submission.

The second part of the lab involved creating a Google Earth tour that moves through key locations in South Florida, including the Miami metropolitan area, Downtown Miami, Fort Lauderdale, Tampa Bay, St. Petersburg, and Downtown Tampa, before returning to the full regional view. This required creating placemarks for each location and recording a guided navigation through them while adjusting map layers as needed. The tour allows viewers to experience the data dynamically, shifting from a broad regional perspective to detailed urban environments.

The most difficult part of this lab was controlling the speed and camera angle while recording the tour. Managing smooth transitions while tilting, zooming, and rotating the view proved challenging, especially when trying to highlight 3D buildings in urban areas. It took multiple attempts to achieve a balance between movement and clarity without making the tour feel rushed or disorienting.

Overall, this lab provided valuable experience in presenting spatial data in a more interactive and user-friendly format. It demonstrated how Google Earth can be used not only as a visualization tool but also as a storytelling platform, allowing users to guide viewers through geographic patterns and relationships in a way that static maps cannot.