![]() ![]() Chapter 4: Intro to Raster Data in Python.SECTION 3 INTRODUCTION TO RASTER DATA IN PYTHON.- Processing Spatial Vector Data in Python.Chapter 3 Processing spatial vector data in python.An extensive, free, online book based on the US Army Field Manual: "Map Reading and Land Navigation" that includes many of the skills presented here, but also many others.is a very basic introduction to topographic maps.Some basic instructions on reading topographic maps.One of many sources for free downloadable topographic maps.If you feel like you need more help, or more information about topographic maps, here are some links to help you think about topographic maps on the whole. You can complete the pages linked above with no extra help. Create a topographic profile across the summit of Mount Wenner.Plot elevations along the line A-B, connect the points with a smooth line to construct a topographic profile.The following are examples of types of questions that you might see in a typical question that asks you to draw a smooth line. Parts of this module will walk you through the steps to making a topographic profile, something geoscientists do often. This helps them to see hazards, draw conclusions about the strike and dip of the geology beneath the land, among other applications. Why would you want to draw a profile of the landscape? Many geoscientists like to visualize the shape of the land as if they had sliced through it. Parts of this module will walk you through how to calculate the slope of a hillside or groundwater table surface or anything for which you know the distance and difference in elevation.ĭrawing a topographic profile is related to slope and understanding the shape of the land. It also influences volcanic hazards, limits permissible land use (such as farming and development), and much more. Why would you want to calculate the slope of a hillside? The slope can tell us whether this is a good site to build, whether a road will become covered with debris, or how difficult it will be to hike to that peak. One of the most practical exercises found in geoscience textbooks involves calculating the slope of a hillside or other part of the ground surface. Parts of this module teach you about how to read topographic maps so that you can complete other applications that these types of contour maps are used for. Geoscientists make and use them to construct geologic maps, to find the best building sites, to estimate where flooding will take place, and to determine the best sites for archeological or paleontological digs. Topographic maps are used to understand the shape of the land, whether a slope will fail, how glaciers are changing, and geologic history, among many other things. The ability to read and interpret topographic maps is considered a basic skill for all geoscientists and geoscience students. They are also commonly used by field geologists for a variety of applications. Topographic maps will be familiar to those of you who are hikers or outdoor enthusiasts they are used to understand the landscape over which you will hike (or rock climb or ski, etc). Why should I become familiar with all aspects of topographic maps? ![]() This module is designed to give you experience examining and reading topographic maps, understanding scale, calculating slope and drawing topographic profiles. Although these can be mathematically derived, most geologists create them by measuring the elevation (and position) in the field (or on an aerial photo), plotting elevation on a map and connecting lines of equal elevation (much like connect-the-dots except that all the same numbers are connected, rather than in sequence). ![]() Topographic maps show the three-dimensional shape of the landscape by representing equal elevation with lines on a two-dimensional map they are in essence a type of contour map (also used in meteorology and oceanography). ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |