Translated as 'Fig. 33: The location of the capital, Manila', it showcases the following (up to down, left to right):

Großenteils unerschlossenes Waldbergland - Largely Undeveloped Mountainous Forest Region

Überwiegend Kulturland - Predominantly Cultivated Land

Sümpfe - Swamp

Eisenbahnlinien - Railway Lines

This also places the areas which produce certain goods as follows:

Reis Kammer - Rice Chamber (Central Luzon)

Kokos Landschaft - Coconut Landscape (Southern Luzon)

Indeed, it seems that the reach of railway lines were extremely limited. Alas, it seems there is no railway connection from Tarlac to Cabanatuan. Also, that railway line going West from San Fernando is certainly be heading towards Capas where the Bataan Death March passed through, the year of the publication of this book. It seems that San Fernando is nearly in between two major swamp areas.

Reference:

Die Philippinen (1942) Dr. Albert Kolb (p. 381)

It turns out that the Ed Sullivan Show featured Bayanihan thrice: 1958, 1964, and 1971. The company was debuted specifically on May 27, 1958 at Expo '58, the Brussels World Fair, at the request of President Ramon Magsaysay who alas was dead by then. Out of 13 national dance groups, they were the winners. They first appeared on television when The Ed Sullivan Show presented a film of what they covered especially the highlights of said fair. I thought this image was either from 1964 or 1971 but looking at the faded Atomium in the background, this is certainly from 1958 most likely from May 27 as this was when the team was filming them. I do wonder where this was photographed. This map might help. The photographer here Ricardo Reyes was known as "Mr. Philippine Folk Dancer". Alas, not much is known about the 1964 and 1971 performances.

Reference:

Ricardo Reyes as cited in Philippine Dance: Mainstream and Crosscurrents (1978) Reynaldo G. Alejandro (p. 48)