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The Boston Indicators Project
Metropolitan Area Planning Council
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Metro Boston DataCommon
ABOUT THE PROJECT
QUICK GUIDE
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datamap
Introduction to the website.


Community Snapshots
Instant statistics and maps in PDF.
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datamap
Launch the mapping tool.

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Browse Data
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regional map gallery
Sample maps with explanations.
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  t  Get Adobe Reader
To open PDF files, download free software here.
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Quick Guide to Mapping

If you are new to this tool, please consider exploring its many functions through the Tutorial. The page below offers a summary of those functions and their icons. We encourage you to print this out and keep it next to you while you work.

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map guide

Map layers – A layer is a subdivision of a GIS database containing related data. Layers can be visualized as transparencies, which allow the user to view and analyze information, selectively by theme. Map layers here are categorized by themes, including population, economy, education, geographic boundaries, and so on.

Quick map – Quick maps are pre-made maps for an existing theme. For example, the quick map of Population contains data of population change, population density change, and so on.

Hyperlink to data source – These are hyperlinks that link to the data source for the data represented by each map layer. Click on the layer name will open a new window, which is the website from which we obtain the data of that layer.

Guide to Mapping Tools

 Zoom In

With the Zoom In tool you are able to zoom in by clicking on a location or by dragging a box to define a particular extent.

 Zoom Out

To zoom out on a map, pick the Zoom Out tool.  Define the extent of the area that you wish to zoom out to by clicking on a location or by dragging a box to define a particular extent.

 Full Extent

The Zoom to Full Extent button zooms you to the full extent of the map.  The full extent is often the extent of the map displayed when the viewer is initially launched.

 Zoom to Active Layer

Choosing the Zoom to Active layer button means that you will be zoomed to the extent of a particular layer.  You will be zoomed in or out and panned so that the viewer extent matches the layer extent.

* Zoom Previous

The Zoom to Previous Extent button allows you to jump back to your last map extent.  Note that this function remains inactive until you change extents.

 Pan

The Pan tool lets you navigate around the map.  To move around the map hold the mouse button down while you drag the pointer across the map, whatever part of the map you grabbed, will end up wherever you release the mouse button.

 Identify

The Identify button allows you to click a feature and see a list of its attributes.  A layer must be Active, in order to be identified.

 Clear

The Clear tool erases a selected markup feature from the map.

 Toolbox

The Expanded Toolkit holds tools that are used for advanced functions for the map. These tools are typically used once a user has become comfortable with the basic navigation tools. The Expanded Toolkit includes tools that allow you to draw on the map, save, print, email, extract data, identify, and search.

 Identify Visible

The Drill Down map function identifies and outputs all the features that exist at a particular location. Features from all layers that are turned on are output, regardless of whether they are visible at the current scale.

 Identify by Radius

The Identify by Radius tool allows users to get attribute information from a layer within a defined circle.

 Select

The Select tool selects and lists features intersected by a user drawn rectangle.

 Measure Distance

The Measure Distance map function enables you to measure distances on the map.  You can measure the distance between two locations or you can measure the total distance of a route, with multiple stops.

 Measure Area

The Measure Area tool lets you draw a polygon and calculate the area inside.

Add Point to Map

The Add Point to Map tool allows you to draw points on the map.

Add Line to Map

The Add Line to Map tool allows you to draw lines on the map.

Add Rectangle to Map

The Add Rectangle to Map tool allows you to draw a semi-transparent rectangle on the map.

 Add Polygon to Map

The Add Polygon to Map tool allows you to draw a polygon with 3 or more sides on the map. Like the rectangle mark-up tool, the polygon will be semi-transparent.

 Add Text to Map

The Add Text to Map tool allows you to add text directly to the map.

 Add Label to Map

The Add Label to Map tool allows you to automatically label features in the Active Layer.

Add Grid to Map

The Add Grid to Map tool allows you to place a grid on the map.

 Add X,Y Location to Map

The Add a Location to Map tool allows you to add a point to the map and display the Latitude and Longitude coordinates.

 Erase Selected Markup

The Erase Markup tool allows you to delete selective markup that you have made on the map.

 Save Project

The Save Project tool allows you to save a mapping session to be used for later.

 Open Project

The Open Project tool allows you to open a previously saved project.

 E-mail

Use the Email button to send your current map view as a PDF map or a JPEG image.

 Generate Querey

The Query Tool allows you to design a query using logical expressions, which will select features that match your attribute criteria.

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