D 2020-09-12T10:51:13.281 L Sample\sPlanet\sEarth P b6d1a6c58a2fcf86fe9747194f2a9472389b9f3a U sandro W 9442

Quick How-To Guide for the Planet Earth sample

In this tutorial we'll assume that you've already studied and understood the tutorials about the Giglio sample
Now we'll examine the Planet Earth sample which will allow us to delve further into new details that we previously ignored.

The following table summarizes for quick reference all Coverages contained into the Planet Earth sample database:

Coverage nameTypeDescription
etopo1RasterGlobal DEM - Digital Elevation Model
true_marbleRasterNatural colors - RGB low-resolution mosaic of Landsat imagery
countriesVector2D Polygons - National Boundaries
countries_vwVectorSpatial View derived from countries
topo_statesVectorTopology derived from countries


All datasets are based on open data available at the following URLs:



Step #1 - General Introduction

In this first contact with Planet Earth we'll simply test the basic rendering capabilities of the Map.

You are simply expected to test the pan and zoom tools while switching on and off the various map layers.

Step #1.1 - Testing the ETOPO1 background

The side figure shows how the Map will be when applying the following layers selection:
  • ETOPO1 background
  • Countries (National Boundaries - red lines) with labels corresponding to each Nation.
    • Note: labels will be printed only if they fit inside the MBR of the corresponding Polygon
 fig_ex_dem

Step #1.2 - Testing the True Marble background

The side figure shows how the Map will be when applying the following layers selection:
  • True Marble background
  • Countries (same as above).
fig_ex_tm

Step #1.3 - Testing the Political Map

The side figure shows how the Map will be when applying the following layers selection:
  • Countries (view) background
    • Note: Each Country is internally filled with a different color, in such a way that confining Nations will never share the same color.
  • Countries (same as above).
fig_ex_pol

Step #1.4 - Testing Topology

The side figure shows how the Map will be when applying the following layers selection:
  • topo_states (Topology) alone. All Topology Primitives are represented as follows:
    • Nodes: red circles.
    • Edges: blue lines.
    • Faces: pale yellow polygons.
    • Face Seeds: yellow stars.
    • Edge Seeds: yellow diamonds.
    • .
fig_ex_topo

Step #2 - Creating, populating and styling the Raster Coverages

Step #2.1 - Preparing to load the Coverages in MapPanel

 fig1

Step #2.1 - Preparing to load the Coverages in MapPanel

 fig2

Step #2.1 - Preparing to load the Coverages in MapPanel

 fig3

Step #2.1 - Preparing to load the Coverages in MapPanel

 fig33

Step #3 - Creating, populating and styling a Vector Coverage based on a Spatial Table

Step #3.1 - Preparing to load the Coverages in MapPanel

 fig31

Step #3.2 - Preparing to load the Coverages in MapPanel

 fig32

Step #4 - Creating, populating and styling a Vector Coverage based on a Spatial View

Step #4.1 - Preparing to load the Coverages in MapPanel

 CREATE VIEW countries_vw AS SELECT pk_uid AS rowid, name AS name, CASE mapcolor7 WHEN 1 THEN '#FF0000' WHEN 2 THEN '#00FF00' WHEN 3 THEN '#0000FF' WHEN 4 THEN '#FFFF00' WHEN 5 THEN '#FF00FF' WHEN 6 THEN '#00FFFF' ELSE '#808080' END color, geometry AS geom FROM countries; INSERT INTO views_geometry_columns VALUES ('countries_vw', 'geom', 'rowid', 'countries', 'geometry', 1);

Step #4.2 - Preparing to load the Coverages in MapPanel

 fig4

Step #4.3 - Preparing to load the Coverages in MapPanel

 


    countries_col
    
        <Title>Countries - Political Map</Title>
        A Style setting its Fill color from a Column Value
    
    
        @color@
        1.00
    
    
        #000000
        1.00
        1.00
        round
        round

Step #5 - Creating, populating and styling a Vector Coverage based on a Topology

Step #5.1 - Preparing to load the Coverages in MapPanel

 fig5

Step #5.2 - Preparing to load the Coverages in MapPanel

 fig6

Step #5.3 - Preparing to load the Coverages in MapPanel

 SELECT TopoGeo_FromGeoTableNoFaceExt('topo_states', NULL, 'countries', NULL, 'dustbin', 'dustbin_view', 512); SELECT TopoGeo_Polygonize('topo_states'); SELECT TopoGeo_UpdateSeeds('topo_states');

Step #5.4 - Preparing to load the Coverages in MapPanel

 fig7

Step #5.5 - Preparing to load the Coverages in MapPanel

 fig8

Step #5.6 - Preparing to load the Coverages in MapPanel

 fig9
Z 2334fccc74c3057b6ffc379a3be945ac