Some of those areas have different conditions a couple blocks away from great locations.

How is the rest of the block?

Those are the main blocks to resale, just like timeshares. 

It's mostly a risk / lack of hassle map.If you're going to be investing in one of the yellow areas or in general inside the circle you probably want to go walk/drive the neighborhood as things can change DRASTICALLY in a block or 2.My neighborhood is 2 blocks from a neighborhood with houses 1/4 the value.

What does Zillow and rentometer say for the 10 block radius?

I love the ones who text you demanding a response but forget they had blocked you.He was going to take us to court for his security deposit. 

I live a few blocks from Grace campus. 

The main homeless areas start just a couple blocks east of Petco Park.

Here is a quote from the times on the stations:"There will be four stations: A new Hammond Gateway Station located about three blocks west of the city's current South Shore station, a second Hammond station at 173rd Street, a station at Ridge Road in Munster, and a station adjacent to the final stop at Main Street."

Also, be aware that Indy can vary block to block so you have to know the neighborhoods well.