3 replies to this topic

[frax]

I found this presentation interesting, it is from an FAO report on poverty mapping in Uganda, but it was just used to illustrate a process and metholodogy they used (in an Appendix).

Example of temporal Fourier processed Land Surface Temperature images of the USA. The mean is shown in red (upper left), the annual amplitude in blue (upper right), the annual phase in green (lower left) and the combination of all three images in the multi-colored image, lower right. The red image shows that average temperature is higher in the South and decreases North-wards. The blue image, however, shows that the seasonal variation in temperature is greatest in the North. The green image (where later phase is brighter colored) shows that the seasonal peak of temperature tends to be later in the North. Notice how topographic features - such as the Rocky Mountains - affect the regional patterns.

I just found it interesting that they chose to display the three parameters this way. Does it work... I am not sure...

[MapMedia]

Is that an Andy Warhol piece?

I would be interested in seeing long-term average surface temp outputs from this satellite. This is great information. Thanks for the link!

[danielle]

Thanks for sharing these maps. I have been thinking about doing something similar with density data, and this is the first example I've seen. I like the idea of combining color theory with grid calculations.

Do you know if this overlay technique has a specific name or history? Are there other examples?

[Martin Gamache]

I've seen lots of examples of these in the geosciences.

It's really just a tri-variate mapping method with raster images, I think it is mentioned in Borden & Dent.