Contextualization

Introduction

Cartography is the science dedicated to the design, production, and study of maps. It represents a fundamental tool for Geography, allowing the spatial visualization of natural and human phenomena. Within Cartography, scale, cartographic projection, and geotechnology are key concepts.

Firstly, the scale is a ratio that indicates the relationship between the dimensions on the map and the actual dimensions on the ground. It is essential to understand the extent of what is being represented on the map. There are two main types of scale: numerical scale, which is a ratio between two measurements, and graphic scale, which is a graph indicating the correspondence between the measurements on the map and the actual measurements.

Cartographic projection is the graphical representation used to reproduce the Earth's surface or part of it on a flat surface in order to produce a map. There are several projection techniques, and each has its strengths and weaknesses, depending on what is desired to be represented.

Finally, Geotechnology is an area of technology that deals with technological applications focused on the management and analysis of information with geographic reference. Such technologies include geographic information systems (GIS), satellite images, GPS, among others.

Contextualization

Cartography plays a fundamental role in our daily lives. Maps are used in a variety of contexts, from navigation (GPS), urban planning, natural resource management, to social, economic, and environmental studies.

A proper understanding of scale is crucial to correctly interpret maps. For example, a map of an entire country on an A4 paper can only be made with a very small scale, which means that details will be lost. On the other hand, a map of your city on an A4 paper will have a much larger scale and therefore will be able to show much more detail.

Cartographic projections are also fundamental to how we understand the world. Projections influence how we perceive the proportion and relationship between different parts of the world.

Finally, geotechnology has revolutionized the way we collect and analyze geographic data, allowing the generation of increasingly precise and detailed maps, as well as the analysis of large volumes of data quickly and efficiently.

Atividade Prática

Activity Title: "A Map in Hand and a lot of Geotechnology in Mind"

Project Objective

Students should understand and apply the concepts of scale, cartographic projection, and geotechnology. For this, each group will produce a map of a place of their choice using geotechnology tools and will give an explanatory presentation addressing these concepts.

Detailed Project Description

Each group of 3 to 5 students should choose a location of interest (it can be their city, a national park, a monument, etc.). Using geotechnology tools, such as geographic information system (GIS) and satellite images, students will collect data and information to create a map of that location, taking into account the scale and cartographic projection.

In addition to creating the map, each group will produce a detailed report containing information about the chosen location, a description of the data collection processes, the choice of scale and projection used, and an explanation of the decisions made during the process.

Finally, each group will present their work to the class, explaining their processes and decisions, and leading a discussion on the challenges and conclusions of the project.

Required Materials

• Computer with Internet access
• Geographic Information System (GIS) software, such as QGIS, which is free and open-source
• Satellite images of the chosen location, which can be obtained from free sources like Google Earth or NASA
• Material for writing the report (word processing software, such as Word or Google Docs)

Detailed Step-by-Step for Carrying Out the Activity

1. Choose a location of interest and conduct initial research on it.
2. Use GIS software and satellite images to collect data and information about the location.
3. Create a map of the location, considering which scale and projection are most suitable for your objective.
4. Write a report detailing information about the location, how the data was collected, how the map was created, and what decisions were made.
5. Prepare a presentation for the class explaining your process and discussing the challenges and conclusions of the project.
6. Present your work to the class.

Project Deliverables

1. Map of the chosen location, created via GIS and/or satellite images.
2. Detailed project report containing information about the location, description of the data collection process, map development, decisions made, and project conclusions.
3. Presentation to the class.

Students should write a report containing:

1. Introduction: Should contain the contextualization of the chosen location, its relevance, and the project's objective.
2. Development: Should contain an explanation of the map development process, including the description of the collected data, the choice of scale and projection, the geotechnology tools used, and justifications for the decisions made.
3. Conclusions: Should summarize the main learnings of the project, analyze the challenges encountered, discuss the solutions adopted, and draw conclusions about the process.
4. Bibliography: Should list the sources of information and data used in the project.

These deliverables are a fundamental element for the practical application of the theoretical concepts learned in the classroom. The creation of the map, the elaboration of the report, and the presentation contribute to the acquisition and consolidation of technical and socio-emotional skills, such as the ability to analyze and synthesize information, effective communication, problem-solving, creativity, and teamwork.