What Is Spatial Sampling?


Researchers who want to determine the distribution of certain
properties over geographic space are usually faced with sampling
limitations. For example, a mining company that wants to know the
percent content of ore in a mine can't test every inch of the mine's
area to determine its contents. The company might instead use spatial
sampling to test representative samples across the entirety of the
mine to estimate the total value of the mine. DefinitionSpatial
sampling is a process by which a number of samples are taken to
determine the contents of a larger geographic area. Each sample point
contains information on the variable of interest at that spatial
location. The overall distribution
In "A Framework of Intelligence," Robert Kamp defines spatial
intelligence (or spacial IQ) as relating to "mental rotation,
mirroring, translation, comparing shapes, estimation of angles and
relative distances and searching." In other words, it relates to your
ability to recognize objects and shapes, and see how they relate to
one another. If you can look at pieces of a puzzle and see how they
fit together or look at a Rubik's Cube and determine how to solve it
before you have touched it, you are using spatial IQ. Howard
Gardner's Multiple IntelligencesSpatial IQ is part of Howard Gardner's
theory of multiple intelligences. In 1983, Gardiner speculated that
rather than the two traditional
Health
I am trying to use R to model grids of agents that change their
decisions based on the decisions of other agents in their direct
proximity. Basically - each agent looks to the other agents around him
on the grid, and might change its behaviour based on the the actions
around him. I have included some sample dinky-toy code per below to
show (one iteration) of such dynamic.I am wondering whether a) there
is an elegant manner to address the boundaries of the grid (currently
the t+1, i+1 code does
Programming Languages
Hi All,
I have the following query which was based on a working
query in MySQL:
(dont be afraid of the size of the query you see
below, later on I will concentrate on part of this query)
SELECT
count(*) FROM ((SELECT * FROM tileinfo where julianDay BETWEEN
DATE2JDAY((2003-03-01 00:00:00),0) AND DATE2JDAY((2003-03-01 23:59:59
),0) AND intersects(tile, geomFromText(POLYGON((-10.84 35.8,18.14
35.8,18.14 59.41,-10.84 59.41,-10.84 35.8)),4326))) tic0 LEFT JOIN
(tileinfo_meta__2p left join meta__2p on tileinfo_meta__2p.fk_name =
meta__2p.pk_name) on tic0.pk_tileinfo = tileinfo_meta__2p.fk_tileinfo
),
((SELECT * FROM tileinfo where julianDay BETWEEN
Development
I have nearly 1,00,000 records in my recordset. I would like retrieve
1000 Random records from the recordset.How to do it using VB and
ADO
Programming Languages
Ok...I have created a database that our auditors want to use to
chose particular claims to audit. What I need to be able to do is
select a specific number of records for each claims adjuster (2.5% of
the total records that the adjuster has processed). The records for
each adjuster selected should be chosen at random. Any suggestions?
Thanks in advance for your help!!
Access
as part of my project i have to develop an application in j2me that
samples the audio input from the user and i have to create a stream
using the sampled values.
is it possible to do this?if so,can u
plz tell me the package to use for this?
thanx.
Mobile Programming

I'm trying to produce a nice bubble plot overlaid on top of a
basemap of the US (i could import a shapefile if that is preferred but
i've been using the R basemaps.



library(ggplot2,sp,raster,maps,mapdata,maptools,ggmap,rgeos)
myData =
data.frame(name=c("Florida","Colorado","california","Harvard","Yellowstone"),
lat=c(28.1,39,37,42,44.6),
long=c(-81.6,-105.5,-120,-71,-110),
pop=c(280,156,128,118,202))


Using this code below, that i adapted from another stack overflow
post ( href="http://stackoverflow.com/questions/23427479/create-bubble-plot-in-r-using-satellite-map">Create
bubble plot in R using satellite map), i am able to overlay a
bubble plot on a map of the US. However this renders very slowly, the
extent is too tight, it is bounded in a box, i'm not able to add other
layers to the plot from what i can tell, and the base map is thick and
not visually clean.



xy <- myData[,c("long", "lat")]
nl <- getData('GADM', country="USA", level=1) #raster data, format
SpatialPolygonsDataFrame
nl <- gSimiplify(nl, tol=0.01, topologyPreserve=TRUE)
# coercing the polygon outlines to a SpatialLines object
spl <- list("sp.lines", as(nl, "SpatialLines"))
SPDF <- SpatialPointsDataFrame(coords=xy, data=myData)
coordinates(myData) <- c("lat", "long")
projection(SPDF)<- "+proj=longlat +ellps=WGS84 +datum=WGS84
+no_defs +towgs84=0,0,0"
coordinates(SPDF)[1:5,] #retrieves spatial coordinates form the
dataframe
bubble(SPDF, "pop", sp.layout=spl, main="This is It!")


I can draw a nice basemap using this code. I add points to the map
but they are not sized by the pop column in my data. And i can add
additional layers to this map. But can i control the size of the
points and the symbol itself like i can using a bubble plot?



map(database= "world", ylim=c(45,90), 
xlim=c(-160,-50), col="grey80",
fill=TRUE, projection="gilbert",
orientation= c(90,0,225))

coord <- mapproject(myData$lon, myData$lat,
proj="gilbert",orientation=c(90, 0, 225))
points(coord, pch=20, cex=1.2, col="red")


Can anyone please guide me towards the best way to plot a bubble
map in R where i can adjust the fill and outline of the symbols in the
bubble map, And i can add a clean basemap, that i can a) control the
colors of (fill and lines) and b) add additional layers to (for
instance another shapefile layer).



Thank you in advance for any advice.

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