Re: pollutants distribution over traffic map

Hi,

I am try to plot pollutants conc. over map (with highways on map)in GA. The pollutants data are two dimension grids data. What I did in modified shapefiles_12.ncl script are:
First make poly map by poly = gsn_add_shapefile_polylines_subset(wks,map,shp_filename,"ROUTE",\
                                            highways,colors,pres)
second read two dimensional data, and lat/lon, make plot by plot = gsn_csm_contour_map_ce(wks,dat2d_1(:,:),res)

Then overlay two plots by overlay(poly,plot).

But it gives error: fatal:Number of elements of dimension (0) of argument (0) is (464) in function (overlay), expected (1) elements. That means overlay function requires same dimension of poly and plot?

Thanks much,

cl

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Received on Tue Apr 9 15:41:03 2013