A new image mosaic of Greenland using Landsat-8 OLI images

Volcanic_Landforms-IINew land on Earth can form in powerful and surprising ways. One of the main processes is through volcanic eruptions. When a volcano erupts, molten rock called lava flows out onto Earth’s surface. As it cools and hardens, the lava forms new land. These eruptions can happen both on land and under the ocean. When lava erupts underwater, it cools quickly, forming rock that may eventually form islands. The Hawaiian Islands were formed this way. They are made of shield...

Volcanic Landforms-ILava is molten rock that erupts from beneath Earth's surface. Once it reaches the surface and cools, it hardens into solid rock. These rocks are called extrusive igneous rocks, and they help shape different landforms. Some of the most recognizable landforms made by lava include volcanoes, lava domes, and lava plateaus. Volcanoes can take many forms depending on how the lava flows and how explosive the eruption is. Lava can also erupt through long cracks in the Earth's crust...

Surveyors use Global Positioning System (GPS) technology to measure the precise location and elevation of points on Earth. In a recent survey, GPS receivers were used to determine the coordinates and elevations of two park monuments. The process involved careful mission planning, data collection, and correction to ensure accuracy. The survey began with mission planning to identify optimal satellite visibility and minimize Position Dilution of Precision (PDOP). A geodetic control point...

In the past, planning projects such as schools or public facilities required extensive manual effort to gather and compile data. Information such as property boundaries, soil characteristics, road networks, zoning regulations, and flood zones had to be sourced individually from courthouses, utility providers, and registry offices. Assembling these datasets into a coherent format often took several months, delaying project timelines.The introduction of Geographic Information Systems (GIS)...

Map Projections IA map projection is a way to show the Earth’s round surface on a flat piece of paper or a screen. Since Earth is a sphere, flattening it always causes some distortion—meaning shapes, sizes, or distances may not be perfectly accurate. Scientists and cartographers (mapmakers) use different projections depending on what they need to show.Types of Map ProjectionsMercator Projection – Makes straight lines easy to follow for navigation, but it stretches land near the poles,...

A Geographic Information System (GIS) combines specialized software and hardware to effectively manage, analyze, and present spatial and related data. GIS software includes critical functionalities such as a user interface for easy navigation, database management tools for handling spatial and attribute data, and data retrieval features for efficient access. Analytical tools transform raw data into insights, while display functions produce maps and reports in various formats for effective...