est_NewsFeed
09/07/2021 ... [+]

We made some updates related to the Sociocultural Data Report (SDR).


First, when ETDM projects are sent for review, there is an additional SDR provided for the quarter-mile buffer.


Second, we added a new analysis methodology and now provide two versions of the SDR: Clipping and Intersecting. These are block group analysis methodologies for block group boundaries that do not precisely correspond to ETDM project analysis areas, user-defined communities, Census places, or AOI boundaries.


Clipping (current methodology)

To estimate the actual population more accurately, this analysis adjusts the geographic area and data of affected block groups using the following methodology:

  • Delete overlapping census blocks with extremely low populations (2 or fewer people)
  • Remove the portion of the block group that lies outside of the analysis area
  • Recalculate the demographics assuming an equal area distribution of the population


Intersecting (new methodology)

This analysis does not adjust the geographic area or data of affected block groups. It includes demographic summaries from any block group that overlaps the project alternative buffer or AOI boundary. Therefore, population that falls out of the SDR analysis area may be included in the results.


Both versions of the report are available for AOIs and ETDM project analysis areas. Note for both Clipping and Intersecting methodologies, there may be areas where there is no population.



08/30/2021 ... [+]

We've improved the way ETDM projects are listed and displayed in the Environmental Screening Tool (EST) Map Viewer. Prior to this, when adding an ETDM project to the map, it only appeared as a single highlight around the entire project. Now, the complete set of project-related layers is loaded, grouped by the project's individual analysis areas. (Analysis areas are the corridors or other project features being reviewed for environmental considerations.) This new organization provides more information to EST users and makes it easier to distinguish different project analysis areas from each other, and from other projects. An additional enhancement for users with project data entry roles allows them to choose between viewing draft or previously published versions of the linework when the linework is being updated. For more information, please see our demonstration video. The video is also available on the Map Viewer under Help. You can find this and more Map Viewer training videos on our ETDM On-demand Training web page.

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