In this tutorial, we will guide you through the process of downloading high-resolution topographic maps from the online repository of the University of Texas Libraries, using Google Earth Pro to visualize and access these valuable resources.
Step 1: Access the Topographic Map Collection
To begin, navigate to the University of Texas Libraries Topographic Maps Collection. Here you can find a wide range of maps available for download.
Step 2: Download the Topographic Map Indexes
Scroll down on the website until you find the option to download the topographic map indexes for the entire world. Click on this option to initiate the download process.
Step 3: Open the KMZ File in Google Earth Pro
Once the download is complete, locate the US Army Maps v17 file (a KMZ file) on your computer. Double-click on the file to open it in Google Earth Pro. Note that Google Earth Pro has been available as a free download from Google since January 2015. If you have not installed it yet, download it from google.com/earth before proceeding.
Step 4: Explore the Map Grids
Upon opening the KMZ file, you will see a variety of grids covering different areas across the globe. Each grid corresponds to a specific map scale, which helps you narrow down your search for the topographic maps you need.
Step 5: Narrow Down Your Search
To focus on a particular area, deactivate all other scale options and activate only the maps at a scale of 1:250,000. This will reduce the number of visible map sheets, making it easier to locate the one you need.
Step 6: Select and View a Map
Once you find an area of interest, click on the corresponding grid cell. A dialog box will appear with information about that map sheet. Click the map hyperlink in the dialog box, or right-click and copy the link to open it in your browser.
Step 7: Download the Topographic Map
After the map image opens in your browser, save it by right-clicking on the image and selecting “Save image as.” Choose a file name and save it to your desired location.
Step 8: Download Additional Maps
To download topographic maps for other regions, repeat the process: navigate to the desired area in Google Earth Pro, click the relevant grid cell, copy the link from the dialog box, and follow the same steps to save the map.
FAQ
- What is a KMZ file? A KMZ file is a compressed KML file used by Google Earth to store geographic data, including the locations and boundaries of map sheets and overlays.
- Can I use these maps for commercial purposes? Always check the usage rights and restrictions associated with the maps you download, as they may vary.
- What if I encounter issues downloading the maps? Ensure that you have a stable internet connection and try refreshing the page or using a different browser if necessary.
