You dont need to create a for the screen media and a for the. Sep 21, 2008 i need help with earth science hw, anyone who can answer both questions first, correctly, would get 10pts. Maps express these relationships in a single common format that can be used for different outputs. Dec 01, 2010 the dita specification provides specialized map types. The ellipses show how imaginary circles on the globe are deformed because of a particular. Except where otherwise noted, images on this site are by tobias jung and are licensed under cc bysa 4. Feb 21, 2011 an overview of different map projections. Editing dita maps you can make changes to a dita map that you have created by checking the map out from the repository, making your changes, and then checking the map back into the repository. Choose from 500 different sets of quiz map projections flashcards on quizlet.
Map projections displaying the earth on 2 dimensional maps the world from space projection from esri, centered at 72 west and 23 south. The mercator projection is a cylindrical map projection presented by flemish geographer and cartographer gerardus mercator in 1569. The dita map and map group domain elements organize topics into hierarchies, groups, and relationships. No projection allows us to flatten the globe without distorting it. The bookmap specialization of ditas standard dita map allows you to organize your dita topics into a collection that can be printed as a book or other paged. This approximates the view of the earth from the sun on the winter solstice at noon in cambridge, ma. A guide to selecting map projections for world and hemisphere. Depending on the purpose of the map, some distortions are acceptable and others are not. To represent parts of the surface of the earth on a flat paper map or on. A map projection is a systematic transformation of the latitudes and longitudes of positions on the surface of the earth to a. This course builds on what you learned in the four preceding classes. If we were to place a light bulb inside a translucent globe and project the image onto a wallwed have a map projection. X x which restricts to the identity map on its image.
Mar 29, 2016 learn about the differences between dita maps and bookmaps. Typically, publications are created from a bookmap while dita maps are used for. Look at the relative sizes of africa and greenland in both maps. Compare it with the following map made with a mollweide projection.
Distortion ellipses help us to visualize what type of distortion a map projection has caused, how much distortion occurred, and where it occurred. This booklet provides a conceptual introduction to map projections and geographic reference systems. The package also includes a stylesheet for merging all the documents referenced by a map into a single dita file. The term map projection can be thought of literally as a projection. This map projection shows greenland as the same size as argentina, and not as the size of all of south america. Introduction d uring the past 15 years, images of the earth have been obtained from satellites for many purposes such as meteorology and detection of resources. Maybe you want to compare the distortions which are present in each and every map projection. This requires a systematic transformation of the latitudes and longitudes of locations from the surface of the globe into locations on a plane. Conditional publishing based on the use of a val file is included. I used the buffer tool to place a 3 mile buffer around each facility. Mathematical cartography also takes in map scales and their variation, the. Search images maps play youtube news gmail drive more. Insert a map file in another map file to reuse content. Countries close to the equator barely change, whereas countries further north shrink dramatically.
These placeholders instructs the dita processing software to automatically. Creating a book in dita using structured framemaker 2017 duration. My favorite map projection for world maps is probably the mollweide projection. Introduction to dita, the dita concept topic type, the dita task topic type, and the dita reference and glossary topic types. This book is not nearly as good as the authors map projection equations, written in 1977 for the naval surface weapons center. Maps consist of references to topics, maps, and other resources organized into hierarchies, groups, and tables. This fourlesson course introduces you to dita maps and bookmaps. Aug 04, 2010 i have a map layer of facility locations points in the lambert conformal conic projection. Dec 27, 2002 a map projection is one of many methods used to represent the 3dimensional surface of the earth or other round body on a 2dimensional plane in cartography mapmaking. Like ditamaps, bookmaps are containers for structure and context metadata, and do not. A dita map describes the relationships among a set of dita topics. The dymaxion map or fuller map is a projection of a world map onto the surface of an icosahedron, which can be unfolded and flattened to two dimensions.
The dita package includes xslt stylesheets that enable you, with a single command, to transform all the documents referenced by a map to html and build a table of contents that links to all of them. This is a digital copy of a book that was preserved for. The field of map projections concerns itself with the ways of translating the curved surface of the earth into a flat map. Every map projection has its own advantages and disadvantages, as it is impossible to project a 3d surface onto a 2d surface without distorting the image in some fashion. Or maybe you dontt want to compare map projections but rather browse a bunch of nice projection images. A guide to map projections in modern cartography texts, by matthew bazylewskyj. The flat map is heavily interrupted in order to preserve shapes and sizes. A coordinate system, datum, and map projection are all components of the coordinate reference system for a spatial object.
The stereographic map projection is another ancient projection, dating back to the second century b. Learn about the differences between dita maps and bookmaps. Rightclick the dita map folder, and from the menu that displays, click open map. List of dita optimized editors dita is xml, so any xml editor can be used to write dita code. Take a look at the following map of the world, made using the well known mercator projection. Aug 16, 2017 my favorite map projection is the montana state plane coordinate system, because most of the maps i make are of montana. Therefore, we strongly urge book and map publishers, the media and government agencies to cease using rectangular world maps for general purposes or. The bookmap specialization of dita s standard dita map allows you to organize your dita topics into a collection that can be printed as a book or other paged layout.
Dita maps have unique attributes that are designed to control the way that relationships are interpreted for different output purposes. A map projectionis a mathematically described technique of how to represent the earths curved surface on a flat map. A poorly chosen projection can result in misinterpreted information and impact the effectiveness of a map. This map of the earth was first designed for sailors, since its particular way of deforming the world makes it. Although the projection procedure inevitably introduces systematic spatial distortions, particular types of distortion can be minimized to suit the geographic scope and intended use of the map data. This process is typically, but not necessarily, a mathematical procedure some methods are graphically based.
This document provides a comparison of the dita features in the default framemaker 8, 9, 10, 11, 12, and 2015, with those in dita fmx 1. A map projection s aspect is its orientation on the page or display screen. Demo of adobe framemaker, justsystems xmetal, and oxygen xml with dita maps. If north or south is straight up, the aspect is said to be equatorial. I also have a layer of census block centroids that is in the same projection. Selecting the most suitable projection can be challenging, but it is as essential a part of cartographic design as color and symbol selection and should be given the same degree of consideration. The geoid is defined as the surface of the earths gravity field, which is approximately the same as mean sea level. All projections of a sphere on a plane necessarily distort the surface in some way and to some extent. In differential topology, any fiber bundle includes a projection map as part of its definition. It is perpendicular to the direction of gravity pull. A bookmap is a special kind of dita map that defines the major structures and setup information for producing maps of information as a book. Learn quiz map projections with free interactive flashcards.
The bookmap specialization of dita s standard dita map allows you to organize your dita topics into a collection that can be printed as a book. However, instead of projecting a light, cartographers use mathematical formulas to create projections. Locally at least this map looks like a projection map in the sense of the product topology and is therefore open and subjective. Using maps, dita lets you stack those clunks into as many. A scanned copy of the 1977 report is available online from the defense technical information center. We used to be able to set attributes in the dita map and they would appear on the title page. A map projection is a way to flatten a globe s surface into a plane in order to make a map. We encourage you to complete the other classes before taking this class. Sep 20, 2015 description of three different types of map projections. In cartography, a map projection is a way to flatten a globes surface into a plane in order to.
Differences in map projections geonet, the esri community. Apr 25, 2017 the map resorts to mathematics to curtail three major types of distortion area, direction, and distance and hence the german term for triple, tripel, is in the name. But that doesnt mean every xml editor is best suited for the job of producing dita. The map element describes the relationships among a set of resources, such as dita topics. Map projections for satellite tracking a new series of map projections, on which satellite groundtracks are shown as straight lines, are derived. Map found via reddit, click for larger version while its well known that the mercator projection distorts the world, the maps here show very clearly by how much. The stereographic map projection is most useful for maps of polar regions for navigation purposes or large continentsized areas of similar extent in all directions. Since the mass of the earth is not uniform at all points, and the direction of gravity changes, the shape of the geoid is irregular. Beginning almost two thousand years ago with marinus and ptolemy, map projections have played a very significant role in cartography.
This example creates a map using the gallpeters projection, rather than the default mercator projection. The stereographic map projection is conformal but not. Map projections massachusetts institute of technology. Map projection concerns the science of mathematical cartography, the techniques by which the earths dimensions, shape and features are translated in map form, be that twodimensional paper or two or three dimensional electronic representations. Enhancing dita with prolog and metadata elements using adobe framemaker 2017. State plane coordinate system zones esri with epsg numbers for associated projections. The bookmap specialization of ditas standard dita map allows you to organize your dita topics into a collection that can be printed as a book or other paged layout. The central focus of this book is on the theory of map projections. A typical dita map might have a title and then a set of topicrefs, in a sequence, in a hierarchy, or both, that define the structure by which topics are to be viewed as a complete information deliverable. Bookmaps are a specialisation of the base dita map information type.
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