intro to geoserver

Intro to GeoServer

Introduction to GeoServer

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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


Logs

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


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


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...

<FeatureTypeStyle><Rule>

<PointSymbolizer><Graphic>

<WellKnownName>circle</WellKnownName><Fill>

<CssParameter name="fill">#FF0000</CssParameter></Fill>

<Size>6</Size>

</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>

<Graphic>

<WellKnownName>circle</WellKnownName><Fill>

<CssParameter name="fill">#0033CC</CssParameter></Fill>

<Size>8</Size>


</Rule>

Another SLD


Functions in SLD

Use functions to simplify output.

<Size><ogc:Function name="Categorize">

<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


YSLD

• Improving on SLD

• Based on YAML syntax

• Native rendering


Benefits of YSLD

Easier to read

SLD:

<CssParameter name="fill">#FF0000</CssParameter>

YSLD:

fill-color: '#FF0000'

Benefits of YSLD

More compact

<Rule><PointSymbolizer>

<Graphic>

<WellKnownName>circle</WellKnownName><Fill>

<CssParameter name="fill">#FF0000</CssParameter></Fill><Stroke>

<CssParameter name="stroke">#000000</CssParameter><CssParameter name="stroke-width">2</CssParameter>

</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:

<Fill>...</Fill><Stroke>...</Stroke>

Invalid:

<Stroke>...</Stroke><Fill>...</Fill>

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


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/


http://geoserver.org

http://docs.geoserver.org

https://lists.sourceforge.net/lists/listinfo/geoserver-users

https://lists.sourceforge.net/lists/listinfo/geoserver-devel

https://osgeo-org.atlassian.net/projects/GEOS/

For more information

http://boundlessgeo.com


http://boundlessgeo.com

Questions? / Thanks!


intro to geoserver

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