Intro to GeoServer

Introduction to GeoServer

Outline

1. Installing GeoServer

2. GeoServer web interface

3. Overview

4. Working with data

5. Styling

6. Web map output

What is GeoServer?

GeoServer is an open source software server written in Java that allows users to shareand edit geospatial data

Section 1: Installing

GeoServer is a core component of OpenGeo Suite.

Installation

Dashboard

Central location for launching applications and resources.

Section 2: GeoServer web interface

Manage GeoServer graphically.

Tour of the interface

http://localhost:8080/geoserver/

Authentication

Default credentials: admin / geoserver

• Robust security system

• Ability to create custom user accounts and roles

Authentication

Layer Preview

View published layers with minimal clicks

Layer Preview

View published layers with minimal clicks

View application logs inside the application itself

Bonus exercises

• What is the filesystem path to the GeoServer data directory?

• What version of Java is GeoServer using?

Loading your first data set

Section 3: Overview

Basic concepts related to GeoServer and web mapping, including OGC protocolsand useful terminology.

Web servers

http://example.com/some/path/page.html http://example.com/some/path/image.jpg http://example.com/some/path/archive.ziphttp://example.com/some/path/data.xml

Web mapping servers

Like a web server, but designed specifically for conveying geospatial content.

Data sources

Lots of options

• Files (Shapefile, GeoTIFF, MrSID, ArcGrid, JPEG2000, GDAL formats)

• Databases (PostGIS, ArcSDE, Oracle Spatial, DB2, SQL Server)

OGC protocols

• Web Map Service (WMS)

• Web Feature Service (WFS)

• Web Coverage Service (WCS)

• Web Processing Service (WPS)

• ...and more

Web Map Service

Also known as the "map image"

Web Map Service

Example GetMap request:

http://demo.boundlessgeo.com/geoserver/wms?service=wms&version=1.3.0&request=GetMap&layers=osm:osm&styles=&srs=EPSG:900913&bbox=-13744070,6170985,-13720028,6191021&format=image/png&width=600&height=500

Web Map Service

Example GetCapabilities request:

http://demo.boundlessgeo.com/geoserver/wms?service=WMS&version=1.3.0&request=GetCapabilities

Web Feature Service

Also known as the "map source code"

Web Feature Service

Example GetFeature request:

http://demo.boundlessgeo.com/geoserver/wfs?service=wfs&version=1.1.0&request=GetFeature&typename=topp:states&featureid=states.39

Web Feature Service

Example GetCapabilities request:

http://demo.boundlessgeo.com/geoserver/wfs?service=WFS&version=2.0.0&request=GetCapabilities

Other OGC protocols

• Web Coverage Service

◦ Like Web Feature Service (WFS)

• Web Processing Service

◦ Analysis!

GeoServer concepts: Workspace

Notional container for grouping similar data together

GeoServer concepts: Store

A container of geographic data (a file/database)

GeoServer concepts: Layer

A collection of geospatial features or a coverage

GeoServer concepts: Layer group

A collection of layers (WMS only)

GeoServer concepts

GeoServer concepts: Style

Visualization directive for rendering geographic data

Section 4: Working with Data

Load and manage data in GeoServer

Adding a workspace

Publishing a shapefile

Publishing a GeoTIFF

Loading multiple layers

Using the Layer Importer

Bonus: PostGIS and Layer Importer

Load in PostGIS and then publish in GeoServer, all in one step!

Other ways of loading data

• Directory of shapefiles

• REST API

Creating a layer group

Section 5: Styling

GeoServer can render geospatial data as images and return them for viewing ina browser. However, additional information, in the form of a style, needs to beapplied to data in order to visualize it.

Viewing an SLD

SLD structure

• Header

◦ FeatureTypeStyles

▪ Rules

▪ Symbolizers

Simple SLD...

<WellKnownName>circle</WellKnownName><Fill>

</Graphic></PointSymbolizer>

</Rule></FeatureTypeStyle>

Simple SLD

Another SLD example<Rule>

<Name>SmallPop</Name><Title>1 to 50000</Title><ogc:Filter>

<ogc:PropertyIsLessThan><ogc:PropertyName>pop</ogc:PropertyName><ogc:Literal>50000</ogc:Literal>

</ogc:PropertyIsLessThan></ogc:Filter><PointSymbolizer>

<WellKnownName>circle</WellKnownName><Fill>

</Rule>

Another SLD

Functions in SLD

Use functions to simplify output.

<ogc:PropertyName>pop</ogc:PropertyName><ogc:Literal>8</ogc:Literal><ogc:Literal>50000</ogc:Literal><ogc:Literal>16</ogc:Literal><ogc:Literal>100000</ogc:Literal><ogc:Literal>20</ogc:Literal>

</ogc:Function></Size>

Functions in SLD

• Improving on SLD

• Based on YAML syntax

• Native rendering

Benefits of YSLD

Easier to read

fill-color: '#FF0000'

Benefits of YSLD

More compact

<WellKnownName>circle</WellKnownName><Fill>

</Stroke><Size>8</Size>

</Rule>

Benefits of YSLD

More compact

rules:- symbolizers:

- point:size: 8symbols:- mark:

shape: circlefill-color: '#FF0000'stroke-color: '#000000'stroke-width: 2

Benefits of YSLD

More flexible syntax

Valid:

Invalid:

Benefits of YSLD

More flexible syntax

Both valid:

fill-color: '#FF0000'stroke-color: '#000000'

stroke-color: '#000000'fill-color: '#FF0000'

Benefits of YSLD

Contains variables for reusable code

define: &variableshape: circlefill-color: '#FF0000'stroke-color: '#000000'

rules:- name: rule1

scale: [35000,max]symbolizers:- point:

size: 6symbols:- mark:

<<: *variablestroke-width: 2

Benefits of YSLD

Direct match with SLD

SLD ↔ YSLD ↔ SLD

Simple YSLDtitle: Simple Pointfeature-styles:- rules:

- scale: [min, max]symbolizers:- point:

shape: circlefill-color: '#FF0000'

Simple YSLD

Another YSLDtitle: Attribute-based pointfeature-styles:- rules:

- name: SmallPoptitle: 1 to 50000filter: ${pop < '50000'}scale: [min, max]symbolizers:- point:

shape: circlefill-color: '#0033CC'

Another YSLD

Functions in YSLDtitle: Attribute-based pointfeature-styles:- name: name

rules:- name: Population

title: Population with three categoriesscale: [min, max]symbolizers:- point:

size: ${Categorize(pop,'8','50000','16','100000','20')}symbols:- mark:

shape: circlefill-color: '#0033CC'

Viewing an existing style

Editing an existing style

Loading new styles

Associating styles with layers

Error in the ocean

Why doesn't the ocean layer display?

External graphics

Note the graphic in the style:

name: 'Ocean'title: 'Ocean: Graphic fill'feature-styles:- rules:

- scale: [min, max]symbolizers:- polygon:

fill-graphic:size: 16symbols:- external:

url: oceantile.pngformat: image/png

External graphics

Images can be placed in the data directory

External graphics

Revisiting the layer group

Graphical styling: QGIS

Graphical styling: uDig

Section 6: Web map

Open html/map.html in a browser

Web map output

Embed a map in web page

For more information

Webhttp://geoserver.org

Docshttp://docs.geoserver.org

Mailing listshttps://lists.sourceforge.net/lists/listinfo/geoserver-usershttps://lists.sourceforge.net/lists/listinfo/geoserver-devel

Bug trackerhttps://osgeo-org.atlassian.net/projects/GEOS/

For more information

http://boundlessgeo.com

Questions? / Thanks!

Intro to GeoServer

Documents

Transcript of Intro to GeoServer

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