A guide to map projections is an easytonavigate, troubleshooting reference for any gis user with the common problem of data misalignment. When asked, select yes that you want to add the new layer to the map. A zipped shapefile that is added to a web map or added to arcmap from agol will also be projected into wgs 1984 web mercator auxiliary sphere. Article 29280, what geographic coordinate system or datum should be used for my data, links to a document that lists all geographic coordinate systems by continent and country. Save your map document, especially if you havent done so recently. Esri press publishes books and tutorials on gis, cartography, and the application of spatial analysis. A gis geographical information system is a fun and functional piece of equipment that offers maps, and so much more.
Most of these free gis books are available in downloadable pdf format and can be read from a computer or on an ebook reader. A communications satellite or comsat is an artificial satellite sent to space for the purpose of telecommunications. Choose an appropriate map projection for a specific part of the world and map purpose. Melita kennedy at environmental systems research institute esri. An esri class modified by ncgc to include relevant content for soil scientists, taught by ncgc employees who are also esri authorized.
Basics of map projections for arcgis 10 wc rice 3 working with coordinate systems in arcgis 10 wc rice 3 map design and production type free hrs using arcmap in arcgis desktop 10 wc public 3 creating map books using data driven pages ts public 1. Although the earth is best represented by a spheroid, the earth is sometimes treated as a sphere. Pdf on jan 1, 1994, melita kennedy and others published understanding map. A tutorial on map projections and geographic coordinate systems. The definition of the map projection for projected coordinate systems. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext.
In this series, we talk about the basics of map projections, including coordinate systems and datums. An esri training course, either online format with multiple modules, or online video. Whether familiar with the science and mathematics involved with projecting geographical data or learning it for the first time, this book will help users understand the difference between geographic and projected coordinate systems. In cartography, a map projection is a way to flatten a globes surface into a plane in order to make a map. Exhibit 3 listing of available training relative to gis. The circle gives the impression that worcester is approximately the same distance from boston as new hampshire, and that the state is nearly five times longer, east to west, as it is northtosouth. The course format includes detailed information on how these concepts are applied to different regions of the pacific islands.
See choosing a map projection about coordinate systems and map projections. Complete with fullcolor maps and diagrams, this book presents practical techniques on how to identify data projections, create custom projections to align data. Understanding coordinate systems and projections for arcgis. Whether you treat the earth as a sphere or a spheroid, you must transform its threedimensional surface to create a flat map sheet. Coordinate systems, also known as map projections, are arbitrary designations for spatial data. A guide to map projections is an easytonavigate troubleshooting reference for any gis user with the common problem of data misalignment. This topic provides an overview of the types of reports available to you and outlines how you can use these reports to understand trade areas, find new. Understanding map projections landing page for kartoweb. Conic map projections are best suited for use as regional or hemispheric maps, but rarely for a complete world map. Understanding map projections is an important building block when working with and setting up any geographic information system gis. The distortion in a conic map makes it inappropriate for use as a visual of the entire earth but does make it great for use visualizing temperate regions, weather maps, climate projections, and more. This reference guide shows all the supported linear units, map projections, and projected coordinate systems. Completely updated with fullcolor maps and diagrams from arcgis desktop 10. The course format includes detailed information on how these concepts are applied to.
Esri demographic data can be found in a multitude of presentationready reports and maps. Learning more about map projection and coordinate system concepts. One easy way to understand how map projections alter spatial properties is to visualize shining a light through the earth onto a surface, called the projection surface. Many common tasks are covered, including navigating digital maps, finding gis data online, setting map projections, symbolizing and labeling maps, classifying data, making map layouts, building spatial databases, editing data, geocoding addresses, querying maps, processing data, and analyzing spatial relationships. Goals identify the spatial reference information for various datasets create custom coordinate systems and define projections. Article 24893, how to identify an unknown projected. But if the shapefile is an item in agol and the user downloads the zipped shapefile and adds that to arcmap, it will maintain its original projection. Select a suitable map projection or coordinate system. In cartography, a map projection is a way to flatten a globes surface into a plane in order to. Regardless of the map projection chosen, some distortions to these. Essential characteristics of all map projectionsaspect, perspective, and distortionare discussed. This conceptual overview introduces and explains the concept of geodatabasesobjectoriented data modelswhich are introduced in arcinfo 8, the worlds most advanced geographic information system gis software package. This article applies to only arcgis for desktop versions 10.
Understanding map projections melita kennedy, steve kopp. Select from a wide variety of existing reports, or create custom reports to meet your marketing needs. Learn what a map projection is, why they are used and what impact they have on maps gis systems. This selfpaced, online training teaches the fundamental concepts of map projections, datums, and coordinate systems and demonstrates how to use them using esri s arcgis. Presented by john schaeffer juniper gis services, inc. The emphasis is on theory, but students gain practical experience working with arcgis software to apply map projections. You can analyze terrain and compare maps, keeping in mind the fact that the map you see is basically a model of the terrain a gridbased gis offers some algebraic functions to help you finetune a search, and every gis provides a. This poster shows the object model diagram for the geoprocessing scripting object. Completion of basics of geographic coordinate systems or equivalent knowledge is recommended. Geosynchronous a geosynchronous orbit is an orbit around the earth with an orbital period of one sidereal day, intentionally matching the earth\s sidereal rotation period.
For more information on the location of the coordinate systems folder in arcgis for desktop 10. The map class contains properties and methods for storing, managing, and overlaying layers common to both 2d and 3d viewing. Map projectionspdf versions of numerous projections, created. Here is a series of links to help you learn more about applying map projections and coordinate systems in your work.
This book introduces and illustrates geographic and projected coordinate systems and offers information on how they can be applied to data. Basics of map projections esri training web course. Sinusoidal projection wikipedia, the free encyclopedia you may also find it helpful to learn more about coordinate systems, projections, and datums these can be tricky to understand and are often dry topics, unless you find them interesting. Instead of starting with a topic such as map projections or seismicity. All projections of a sphere on a plane necessarily distort the surface in some way and to some extent. Under related information below, click the link titled projections table 2009 to access. Thus a map instance is a simple container that holds the layers, while the view is the means of displaying and interacting with. Redlands, california july, 2015 learn the fundamentals of making digital maps, analyzing geospatial data, and building and editing spatial databases using the workbook getting to know arcgis, fourth edition, published by esri. Updated for use with the latest version of esris arcgis for desktop. Getting started with the arcgis mobile apis kris bezdecny, david martinez andy gup, david cardella.
Esri publishes getting to know arcgis, fourth edition. This requires a systematic transformation of the latitudes and longitudes of locations from the surface of the globe into locations on a plane. Use the workbook and exercises to get started making maps and analyzing data. Web and mobile gis type free hrs introduction to esri community analyst ts public 1.
This selfpaced, online training teaches the fundamental concepts of map projections, datums, and coordinate systems and demonstrates how to use them using esris arcgis. Layers can be added and removed from the map, but are rendered via a mapview for viewing data in 2d or a sceneview for viewing data in 3d. The spatial or map extent covered by the dataset often referred to as the spatial domain learning more about coordinate systems. All publications are available to purchase online and include topics that cover many areas of public and private endeavor including landuse planning, health care, education, business, government, and science. Supports multiple map projections dynamic, cached, and feature layers bing maps and open streetmap.
Free of distortion at the central meridian at 3646 n. The map of massachusetts in unprojected decimal degrees of longitude and latitude note the proportion of the lines and the circle. Arcgis for desktop now supports over 5,000 geographic, projected and vertical coordinate systems. Although the earth is best represented by a spheroid. We will taker a closer look at the popular mercator projection and examine how the. How to define map projections making sure your gis data is in the right place on the map as people share their data over the web, its becoming more important to define the coordinate system to ensure that a dataset displays in its proper location and aligns correctly with other data. Projection basics for gis professionalshelp arcgis for. We will taker a closer look at the popular mercator projection and examine how the projection affects area. Arcinfo, arccatalog, arcmap, arctoolbox, arcplot, and arcedit are trademarks of environmental systems research. This story map traces those that have gained fame as sacred or historic sites, or specimens of unusual size, shape or age. To select a map projection, determine which of the properties is the most important for the project, and select the coordinate system or map projection that best preserves that property. Argis online projections geonet, the esri community. Remove the stations table and stationsevents layer by right clicking and selecting remove. Understanding map projections, datums, and coordinate systems.
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