Aerial maps Archives - Geoinfotech

Geological Maps

by Chioma Innocent | Mon Aug, 2022 | Geoinfotech Blog | 0 comments

GEOLOGICAL MAPS

Geological Maps are special purpose maps that show the geological properties of land – rock types, rock age, bedding planes, shale, coal, and other naturally occurring phenomena.

Geo Maps can be used for many different purposes, including assessing ground-water quality and contamination risks; predicting an earthquake, volcano, and landslide hazards; characterizing energy and mineral resources and their extraction costs; rock formation and types present; land management and land-use planning.

Information obtained from geological maps has been used for both private and public decision-making processes. It helps in the siting of highways and provides information about the structural deposition of rock types in the proposed area to determine what kind of construction risks can’t be taken.

FEATURES OF GEOLOGICAL MAPS

Features can include types of rocks, faults, minerals, and groundwater. From studying a geologic map the user can better understand possible dangers like the potential for floods or earthquakes and help locate important deposits of energy resources, such as water, oil, natural gas, and minerals.

For example, an extensive geo map of Nigeria will show where several types of natural resources and minerals can be found. Geoinfotech’s Geostore contains several examples of geological maps including cities such as Lokoja, Jos, Enugu, etc.

5 USES OF GEOLOGICAL MAPS

Geologists measure features where outcrop or surficial materials are exposed, then infer geologic contacts based on these measurements. A variety of lines, symbols, and text convey information in the form of a geologic map.
Measurements taken at the surface are used to predict the location of geologic units and structures at depth and these predictions are shown on cross-sections.
A geo map is a major tool for communicating geological information to other geologists and the public.
Geological maps are useful to paleontologists because they indicate the age of the rock bodies in which fossils and other discoverable historic items are found.
Colors are used to showcase and differentiate the different features from each other.

Geo maps provide information for a better understanding of Earth. By studying geologic maps, users can identify potential natural hazard areas for floods, earthquakes, landslides, etc. These maps can also provide data on important deposits of energy resources such as oil, natural gas, and coal

Difference Between Aerial Mapping and Photograph

by Ologunagbe Olamide | Wed Feb, 2021 | Geoinfotech Blog, GIS and Remote Sensing | 0 comments

Introduction

An aerial photograph in broad terms is any photograph taken from the air, Aerial photography is the production of photographic images from balloons, helicopters or aeroplanes; it’s used primarily for mapping.

Maps are graphic representations of selected Earth features. Aerial photos are photographs of Earth’s surface taken from an aeroplane at different distances from Earth. Satellite images are digitally produced representations of Earth taken from orbiting sensing devices on satellites.

Difference between Map and Photography.

The big difference between a photograph and a map is that a map represents a vertical “plan” of a region, while a photograph presents a realistic image. These photographs cannot be used for information when we draw maps. A special kind of aerial photograph is used for the drawing of maps.

Aerial imagery is one of the earliest forms of remote sensing. With its origins dated back as of 1858, and till date it remains one of the most widely used and cost-effective methods of remote sensing. Aerial and satellite images, known as remotely sensed images, permit accurate mapping of land cover and make landscape features understandable on regional, continental, and even global scales. An aerial photograph, in broad terms, is any photograph taken from the air. Normally, aerial photography photos are taken vertically from an aircraft using a highly-accurate camera. Quite often photographers require an aerial perspective of locations.

Advantages of Aerial Photography

It provides a synoptic view.
This type of photography is time-saving and economic.
It has a time-freezing ability.
It can provide a stereoscopic view of the terrain.
Aerial photography provides timely information.
Cheaper than conventional surveying.

Aerial photography is still a better choice for most business and personal commercial uses reasons such as, costs less and, in some cases, it’s more up-to-date, as many available satellite maps are more than a year old and don’t necessarily reflect recent changes or developments.