Lightroom to WordPress Metadata Workflow

Lightroom currently makes it easy to embed the following metadata into exported JPGs:

• File Name (Obviously)
• Keywords
• Title
• Caption
• Copyright Date
• Copyright Status
• Creator
• Sublocation
• Label
• Capture Time
• Various Camera and Lens Data

Meanwhile, WordPress supports the following related Media attributes:

• File Name
• Upload date
• Title
• Alt Text
• Description

As an experiment, I exported a JPG from Lightroom after making sure each Lightroom metadata attribute had been assigned a generic value. Then I uploaded the image to WordPress to see which Lightroom attributes were mapped to which WordPress Media attributes by default. The results as follows:

Lightroom File Name => WordPress File Name
Lightroom Title => WordPress Title
Lightroom Caption => WordPress Description

That leaves two useful WordPress attributes, Alt Text and Caption, blank. Ideally, I would have something more like this:

Lightroom File Name => WordPress File Name
Lightroom Title => WordPress Title
Lightroom Caption => WordPress Caption
Lightroom CaptureTime => WordPress Upload Date (Or Post date?)
Lightroom Keywords => WordPress Alt Text
Lightroom Label => WordPress Description

So my questions are this:

1. Is there a way to better map JPG metadata to WordPress media attributes upon upload?
2. Is it possible to access or just echo JPG metadata via PHP?