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CREATE SAMPLING GRID ARCGIS 10.6 HOW TO
CREATE SAMPLING GRID ARCGIS 10.6 SOFTWARE
CREATE SAMPLING GRID ARCGIS 10.6 CODE

Study.zoom<-readOGR(dsn=".",layer="MDzoom") #Import the study site zoomed in shapefile

Let's create this hexagonal grid across our study site by zooming into deer locations from Section 1.3.

HexPols <- HexPoints2SpatialPolygons(HexPts)

We also can create a hexagonal grid across the study site.

Text(coordinates(MDclip), labels=sapply(slot(MDclip, "polygons"), function(i) slot(i, "ID")), Int <- gIntersection(unties,deer.spdf)#requires rgeos library

Now lets extract counties within the extent of the mule deer locations.

Text(coordinates(unties), labels=sapply(slot(unties, "polygons"), #Now add labels of State and County to Map

Rename labels by county name otherwise plot order would be used because duplicate counties within each state (i.e., CO, UT) occured in original shapefile from max.level=3).

Identify the columns with coordinates then make a spatial data frame of locations after removing outliersĬoords

Also need to import several shapefiles for mule deer from Section 1.3.

CREATE SAMPLING GRID ARCGIS 10.6 CODE

Now open the script "GridScripts.R" and run code directly from the script.First we need to load the packages needed for the exercise.Set working directory to the extracted folder in R under File - Change dir.Exercise 1.8 - Download and extract zip folder into your preferred location.For example, disease epidemiology studies often base the size of the grid cell on the dailiy movement distance or home range of the study animal if that data is known (Farnsworth et al. Grids can be of any size and shape but should be based on something biologically meaningful to the animal or system you are studying.

CREATE SAMPLING GRID ARCGIS 10.6 HOW TO

We will explore how to create grids in R for this section. Considering we have already learned how to import shapefiles,

CREATE SAMPLING GRID ARCGIS 10.6 SOFTWARE

Grid systems overlayed on a study site typically are shapefiles that can either be created and imported from GIS software or created in R.

Numerous research objectives require the need for creating a grid system of equal size over a study site such as studies on resource selection and disease epidemiology.