[ncl-talk] landseamask
Mary Haley
haley at ucar.edu
Thu Dec 20 18:00:03 MST 2018
Thanks for providing the files.
I think I understand the ordering of everything that you want, and it can
be really frustrating trying to do this with NCL.
The issue is simply that since the lines and markers are being added to the
terrain map, and then the rain total contours are being drawn on top of
that, they are going to cover up the lines and markers.
The solution seem to be to add the lines and markers to the rain total plot
instead, but in order to do this, you have to provide lat/lon coordinate
information to the rain total map, so that the lines and markers are added
in the correct locations.
Before I go any further with this, can you tell me if the attached image is
what you are looking for?
thanks,
--Mary
On Thu, Dec 20, 2018 at 4:43 PM Ehsan Taghizadeh <ehsantaghizadeh at yahoo.com>
wrote:
> Dear Mary,
> I'm so sorry that this debugging has been prolonged. I've tried to fix the
> problems by myself, however unfortunately I failed.
> I've put input data files in ftp: (wrfout_d01_2018-12-19.tar.gz,
> shp_stations.tar.gz, shp_ostan.tar.gz), also my color table (tvprecp.rgb).
> I've also attached my script, and two figures which reflect my problem. As
> you can see, national boundaries (black poly lines) and province boundaries
> (red poly lines) are masked in WRF5.png by precipitation contours.
>
> I hope you have time to consider my problem again.
> Sincerely
> Ehsan
> On Friday, December 21, 2018, 2:01:08 AM GMT+3:30, Mary Haley <
> haley at ucar.edu> wrote:
>
>
> I'm not sure I follow all that logic, because I'm losing track of what's
> being drawn when. :-)
>
> But, this might work:
>
> lnres at gsPolyDrawOrder = "PostDraw"
>
> If that doesn't work, then I'll need more clarification on what you mean
> by things being masked or not masked. For example, in the image you
> provided, I can see the red province lines, but I'm not sure where you were
> expecting the markers to show up.
>
> At some point I may need to have your script and data if I'm going to
> continue debugging this.
>
> --Mary
>
>
>
> On Thu, Dec 20, 2018 at 12:36 PM Ehsan Taghizadeh <
> ehsantaghizadeh at yahoo.com> wrote:
>
> Dear Mary
> As you suggested I add following line:
> res_tot at cnLineDrawOrder = "PostDraw"
> and it works well. Now I have contour lines and also raster contours
> become smooth. However I still have problem with outlineboundaries and also
> province shapefiles. I've used below line:
> res_ter at mpOutlineDrawOrder = "PostDraw"
> However as you may guess it doesn't work, because after that I have:
> res_tot at cnFillDrawOrder = "PostDraw"
> Same problem is for province shapefile, as province boundaries are masked
> (red lines). But interesting (may be just for me) markers in other
> shapefile (MASA, OIGG, ...) are not masked!
> So the remained problem is masking of outlineboundaries and province
> boundaries in shapefile (WRF4.png is attached).
>
> I'll be thankful if I could have your help about it.
>
> Sincerely
> Ehsan
> On Thursday, December 20, 2018, 8:29:02 PM GMT+3:30, Mary Haley <
> haley at ucar.edu> wrote:
>
>
> Hi Ehsan,
>
> Good catch on the inland water resource addition!
>
> When you set cnFillDrawOrder to PostDraw, this causes the filled contours
> to be drawn last, and since these are raster contours and hence blocky
> looking, you are seeing the artefacts of the blocks bleeding into the
> contour lines
>
> There is a cnLineDrawOrder resource, so perhaps try setting to to
> "PostDraw" and see if it gets drawn on top of the filled contours. You
> might have to play around with the cnFillDrawOrder too, maybe setting it to
> "Draw" instead of "PostDraw".
>
> If you continue to have problems, let us know. There are other ways to do
> this kind of ordering, but it can get a little more involved.
>
> Good luck,
>
> --Mary
>
>
>
>
> On Thu, Dec 20, 2018 at 6:41 AM Ehsan Taghizadeh <
> ehsantaghizadeh at yahoo.com> wrote:
>
> Dear Mary
> Your answer is exactly what I want. However I still have 2 problems and
> I'll be thankful for any help about them.
> 1. Caspian sea and Black sea didn't fill (WRF1.png in attached)! So I
> added following line:
> res_ter at mpInlandWaterFillColor = "SkyBlue"
> and it seems works (WRF2.png in attached).
> 2. However in both figures I missed last shaded contours (here
> precipitation) on water lands! So I added following line too:
> res_tot at cnFillDrawOrder = "PostDraw" ; Also can try "Predraw"
> Now I missed contour lines for both precipitation and boundaries (WRF3.png
> in attached)! Beside that I've got RasterFill for precipitation. I've
> used
> res_tot at cnFillMode = "RasterFill"
> however it didn't affect for figures (WRF1.png and WRF2.png), but it
> affected WRF3.png!
>
> My plot lines are as below:
> plot_terrain = gsn_csm_contour_map(wks,HGT,res_ter)
> add_outlines_to_map(wks,plot_terrain) ; OK
> add_places_to_map(wks,plot_terrain) ; OK
> plot_raintot = gsn_csm_contour(wks,RainTotal,res_tot)
>
> overlay(plot_terrain, plot_raintot)
> draw(plot_terrain)
> frame(wks)
>
> I hope my email is clear and I ask my problem correctly. Also I attached
> my script, even though it seems sloppy and doesn't have input data!
> Any help will be appreciated.
>
> Sincerely
> Ehsan
> On Wednesday, December 19, 2018, 7:55:28 PM GMT+3:30, Mary Haley <
> haley at ucar.edu> wrote:
>
>
> Ehsan,
>
> Do you mean that you want to fill the ocean in some solid color and hence
> mask any data in that area? If so, you can try:
>
> res at mpFillOn = True
> res at mpOceanFillColor = "SkyBlue" ; use whatever color you want
> res at mpLandFillColor = "Transparent" ; to make sure land doesn't get
> filled
>
> You might also need to set some draw order resources, to make sure the
> filled contours and filled map areas get drawn in the right order:
>
> res at cnFillDrawOrder = "Draw" ; Also can try "predraw"
> res at mpFillDrawOrder = "PostDraw"
>
> You can see some masking examples at:
>
> http://www.ncl.ucar.edu/Applications/mask.shtml
>
> Use your browser search to look for "draworder".
>
> --Mary
>
>
> On Wed, Dec 19, 2018 at 8:13 AM Ehsan Taghizadeh <
> ehsantaghizadeh at yahoo.com> wrote:
>
> Hi,
> May I ask how to fill sea (lake, ...) areas differently from land. I've
> tried using "https://www.ncl.ucar.edu/Applications/grid_fill.shtml" (
> grid_fill_5.ncl) and I've got attached map.
> That part which I used from grid_fill_5.ncl are:
>
> ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
> ; Read/open NCL'ls crude (1x1) land-sea mask
> ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
>
> a2 = addfile("$NCARG_ROOT/lib/ncarg/data/cdf/landsea.nc","r")
> lsdata = a2->LSMASK
> lsm = landsea_mask(lsdata, xlat, xlong)
>
> ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
>
> HGT2 := HGT ; replicate for plot
> HGT2 = where(lsm.eq.0 , HGT2 at _FillValue , HGT2)
> HGT2 = where(lsm.eq.2 , HGT2 at _FillValue , HGT2)
> HGT2 = where(lsm.eq.4 , HGT2 at _FillValue , HGT2)
> ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
>
> where "HGT" is "Terrain Height" of WRF. The issue of the attached file is
> raster filled of sea areas. However is there a better way to fill sea areas?
>
> Sincerely
> Ehsan
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