Evolving notes, images and sounds by Luis Apiolaza

Category: spatial

Mucking around with maps, schools and ethnicity in NZ

I’ve been having a conversation for a while with @kamal_hothi and @aschiff on maps, schools, census, making NZ data available, etc. This post documents some basic steps I used for creating a map on ethnic diversity in schools at the census-area-unit level. This “el quicko” version requires 3 ingredients:

  • Census area units shape files (available from Statistics New Zealand for free here).
  • School directory (directory-school-current.csv available for free here).
  • R with some spatial packages (also free).

Continue reading

Spatial correlation in designed experiments

Last Wednesday I had a meeting with the folks of the New Zealand Drylands Forest Initiative in Blenheim. In addition to sitting in a conference room and having nice sandwiches we went to visit one of our progeny trials at Cravens. Plantation forestry trials are usually laid out following a rectangular lattice defined by rows and columns. The trial follows an incomplete block design with 148 blocks and is testing 60 Eucalyptus bosistoana families. A quick look at survival shows an interesting trend: the bottom of the trial was much more affected by frost than the top.
Continue reading

© 2024 Palimpsest

Theme by Anders NorenUp ↑