Spain and Portugal - 1:100,000 Shoreline Image Tiles

Spain and Portugal Shorelines - 1:5,000,000 Landsat ETM+ Images (6-Images)

The above image of the Iberian Peninsula is a composite made up of six Landsat ETM+ mosaics. As an island person, I'm not much interested in most of this composition. In fact, I am only interested in the shorelines plus or minus 5 to 10 kilometers.

Spain and Portugal Shorelines - 1:100,000 J2 Tiles

So, I decided to create a shoreline image of the Iberian Peninsula. I first tried creating a series of 1:50,000 scale images of the coastline. It took way too many images and the scale did not include enought shoreline detail. I upped the scale to 1:100,000 and systematically created a series of 120 tiles to cover Spain and another 51 tiles to cover Portugal. Whereas the Landsat ETM+ images are 865 MBs in size, the 1:100,000 tiles for the entire Spanish and Portugese shorelines are 190 MBs in size (each tile about 1 MB).

N-31-40_2000 (100) ES - 010 J2 (1:400,000)

Let's zoom in and see what one of these shoreline tiles allows us to view. Keep in mind the resolution is 14.5 meters per pixel. So here it goes...

N-31-40_2000 (100) ES - 010 J2 (1:100,000)

N-31-40_2000 (100) ES - 010 J2 (1:50,000)

N-31-40_2000 (100) ES - 010 J2 (1-25,000)

How about that zoom capability? If the 1:100,000 image were of a shoreline I wanted to digitize, it would work just fine. I typically do most of my digitizing work at 1:25,000 to 1:12,500. These tiles would allow the end-user the ability to zoom into shorelines at sufficient scale to accomplish EVS precision shoreline mapping.

If you are interested in Spanish or Portugese shoreline mapping work, these 1:100,000 scale image tiles would do the trick.

Enjoy!