Interface Overview

The MassDOT Crash Open Data Portal is built using a commercial product (ArcGIS Hub) from Esri and provides sophisticated filter and download capabilities. Though this help system provides an interface overview and specific workflow directions it is important to reference the ArcGIS Hub help for up to date details on overall usage.

üEsri Open Data Portal (Hub) Documentation

Key workflows for interacting with the MassDOT Crash Open Data Portal include:

üSearching for Crash Data

üFiltering Crash Data

üDownloading Crash Data

NOTE:  Within this section of the Help System some links will direct you to the Esri Open Data Portal (ArcGIS Hub) documentation. These links are show in red.

NOTE:  There are many nuances to using an Open Data Portal. Key tips and tricks on usage for each workflow (search, filter, download) are indicated using the exclamation point identifier above.

Interface Overview

The Open Data Portal is a commercial, off-the-shelf product from Esri and provides sophisticated filter and download capabilities (in addition to a range of advanced integration features such as API).  The layout and use patterns are similar to thousands of other available Open Data Portals. It consists of a Default Landing Page as well as the Main Interface with six key sections all oriented toward searching for, filtering, and downloading data.

Default Landing Page

Main Interface

Main Interface Sections

1.Navigation Bar (log in to leverage custom user-specific functionality)

2.MassDOT Header Bar

3.MassDOT Crash Data Portal Header Bar

4.Assets Tabs Bar

5.Discover Data Panel

6.Results List

Once you have identified a dataset you would like to download you can click on it in the Results List to open it up in the View Details panel. This window is designed to provide an overview of the dataset in the Overview Tab and the ability to filter and download the data using the Download options.

1.Dataset Title

2.Preview Map

3.My Data Sidebar

4.Overview and Data Tabs (Explore, Chart, and Visualize)

5.Download Options

6.View Details

NOTE:  When viewing the dataset Data tab, you may have to scroll to see all the available fields. You can, however, click Ctrl+f on your keyboard to search for a value within the web page. Using this you can locate fields that you are looking for quickly.

NOTE:  When viewing the data values in the Data tab different browsers will behave differently when rendering empty values. Internet Explorer will, by default, add the word "null" to the cell where a field has no value.  However, Chrome will simply leave it empty.  Be aware the value is in fact not a true database "null" value - it is simply empty.

Data Extraction > Open Data Portal >