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Overview

Artifact ID:	300fb3e88cefc9a32ff47e606864dd39e3bb546f
Page Name:	Sample Planet Earth
Date:	2020-09-12 10:51:13
Original User:	sandro
Parent:	b6d1a6c58a2fcf86fe9747194f2a9472389b9f3a (diff)
Next	739d20864e5850dda0ba51aa3a134cb15c15fb9d

Content

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 name	Type	Description
etopo1	Raster	Global DEM - Digital Elevation Model
true_marble	Raster	Natural colors - RGB low-resolution mosaic of Landsat imagery
countries	Vector	2D Polygons - National Boundaries
countries_vw	Vector	Spatial View derived from countries
topo_states	Vector	Topology derived from countries

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

ETOPO1: NOAA
True Marble: Unearthed Outdoors
Countries: Natural Earth

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

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).

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).

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.

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

Step #2.1 - Preparing to load the Coverages in MapPanel

Step #2.1 - Preparing to load the Coverages in MapPanel

Step #2.1 - Preparing to load the Coverages in MapPanel

Step #2.1 - Preparing to load the Coverages in MapPanel

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

Step #3.1 - Preparing to load the Coverages in MapPanel

Step #3.2 - Preparing to load the Coverages in MapPanel

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

Step #4.3 - Preparing to load the Coverages in MapPanel

<?xml version="1.0" encoding="UTF-8"?>
<PolygonSymbolizer version="1.1.0"
    xsi:schemaLocation="http://www.opengis.net/se http://schemas.opengis.net/se/1.1.0/Symbolizer.xsd"
    xmlns="http://www.opengis.net/se" xmlns:ogc="http://www.opengis.net/ogc"
    xmlns:xlink="http://www.w3.org/1999/xlink"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    uom="http://www.opengeospatial.org/se/units/pixel">
    <Name>countries_col</Name>
    <Description>
        <Title>Countries - Political Map</Title>
        <Abstract>A Style setting its Fill color from a Column Value</Abstract>
    </Description>
    <Fill>
        <SvgParameter name="fill">@color@</SvgParameter>
        <SvgParameter name="fill-opacity">1.00</SvgParameter>
    </Fill>
    <Stroke>
        <SvgParameter name="stroke">#000000</SvgParameter>
        <SvgParameter name="stroke-opacity">1.00</SvgParameter>
        <SvgParameter name="stroke-width">1.00</SvgParameter>
        <SvgParameter name="stroke-linejoin">round</SvgParameter>
        <SvgParameter name="stroke-linecap">round</SvgParameter>
    </Stroke>
</PolygonSymbolizer>

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

Step #5.1 - Preparing to load the Coverages in MapPanel

Step #5.2 - Preparing to load the Coverages in MapPanel

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

Step #5.5 - Preparing to load the Coverages in MapPanel

Step #5.6 - Preparing to load the Coverages in MapPanel