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Re: [Geotools-gt2-users] How to optimize the rendering?
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From: Zheng X. <do...@gm...> - 2012-02-28 15:12:29
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Well, for the first problem, may be not a problem, I have said something
wrong. The fact is the pregeneralized shapefile is the same size with each
other no matter which distance I set, but smaller than the original. So I
think it simplify the shapefile indeed.
But the second problem still exists. I change the baseFeatureName same as
the file of shapefile (XXX.shp), and set featureName to "YYY". Then these
exception were thrown:
java.lang.RuntimeException: java.io.IOException: No such type : YYY
at
org.geotools.data.gen.PreGeneralizedFeatureSource.getSupportedHints(PreGeneralizedFeatureSource.java:408)
at
org.geotools.renderer.lite.StreamingRenderer.getLayerQuery(StreamingRenderer.java:1076)
at
org.geotools.renderer.lite.StreamingRenderer.processStylers(StreamingRenderer.java:1958)
at
org.geotools.renderer.lite.StreamingRenderer.paint(StreamingRenderer.java:804)
at org.geotools.swing.RenderingTask.call(RenderingTask.java:106)
at org.geotools.swing.RenderingTask.call(RenderingTask.java:41)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)
And I tried orginfo, it seems show the shapefile structure and content for
me, like that:
INFO: Open of `XXX.shp'
using driver `ESRI Shapefile' successful.
Layer name: XXX
Geometry: Line String
Feature Count: 91634
Extent: (115.375000, 39.416667) - (117.500000, 41.083333)
Layer SRS WKT:
GEOGCS["Lat Long for MAPINFO type 0 Datum ",
DATUM["MAPINFO",
SPHEROID["World Geodetic System of
1984",6378137,298.257222932867]],
PRIMEM["Greenwich",0],
UNIT["degree",0.0174532925199433]]
MAPID: String (8.0)
ID: String (13.0)
KIND_NUM: String (2.0)
KIND: String (23.0)
WIDTH: String (3.0)
DIRECTION: String (1.0)
TOLL: String (1.0)
CONST_ST: String (1.0)
PATHNAME: String (40.0)
PATHPY: String (250.0)
SNODEID: String (13.0)
ENODEID: String (13.0)
PATHCLASS: String (2.0)
PATHNO: String (13.0)
LENGTH: String (8.0)
ONEWAYCRID: String (13.0)
OGRFeature(XXX):0
MAPID (String) = 605751
ID (String) = 60575100011
KIND_NUM (String) = 1
KIND (String) = 0601
WIDTH (String) = 55
DIRECTION (String) = 0
TOLL (String) = 2
CONST_ST (String) = 1
PATHNAME (String) = Y352
PATHPY (String) = y san wu er
SNODEID (String) = 60575100013
ENODEID (String) = 60575100020
PATHCLASS (String) = 2
PATHNO (String) = 7431
LENGTH (String) = 0.280
ONEWAYCRID (String) = (null)
LINESTRING : 8 points
OGRFeature(xxx):1
MAPID (String) = 605751
ID (String) = 60575100015
KIND_NUM (String) = 1
KIND (String) = 0601
WIDTH (String) = 55
DIRECTION (String) = 0
TOLL (String) = 2
CONST_ST (String) = 1
PATHNAME (String) = Y352
PATHPY (String) = y san wu er
SNODEID (String) = 60575100020
ENODEID (String) = 60575100024
PATHCLASS (String) = 2
PATHNO (String) = 7431
LENGTH (String) = 0.305
ONEWAYCRID (String) = (null)
LINESTRING : 9 points
......
and many similar features repeated. Does these would be helpful to solve my
problem?
On Tue, Feb 28, 2012 at 9:01 PM, <chr...@nv...> wrote:
> Zitat von Zheng Xudong <do...@gm...>:
>
> I tried the PreGeneralized following the two link, but I encounter two odd
>> problems:
>>
>> 1. I found the pregeneralized shapefile is still the same size with the
>> original, no matter which distance I set. Why? Does it means the
>> pregeneralization method is not suitable for my shapefile?
>>
>
> Install the gdal utilities from www.gdal.org. Use
>
> ogrinfo -al -geom=SUMMARY xxx.shp
>
> to get detailed info.
>
>
>> 2. When I tried to load the pregereralized shapefile following the code in
>> http://docs.geotools.org/****latest/userguide/library/data/****<http://docs.geotools.org/**latest/userguide/library/data/**>
>> pregeneralized.html<http://**docs.geotools.org/latest/**
>> userguide/library/data/**pregeneralized.html<http://docs.geotools.org/latest/userguide/library/data/pregeneralized.html>
>> >,
>>
>> like:
>>
>>
>> Repository repo = new RepositoryDSFinder();
>> GeneralizationInfosProvider provider = new GeneralizationInfosProviderImp
>> **l();
>> GeneralizationInfos infos = null;
>> try {
>> infos = provider.**getGeneralizationInfos("map_**info.xml");
>> } catch (IOException e) {
>> e.printStackTrace();
>> }
>> DataStore ds = new PreGeneralizedDataStore(infos,**repo)
>> FeatureSource<**SimpleFeatureType, SimpleFeature> fs =
>> ds.getFeatureSource("XXX")
>>
>> and the map_info.xml is like:
>>
>> <?xml version="1.0" encoding="UTF-8"?>
>> <GeneralizationInfos version="1.0">
>> <GeneralizationInfo dataSourceName="file:XXX.shp" featureName="XXX"
>> baseFeatureName="XXX" geomPropertyName="the_geom">
>>
>
> This should be something lime
> <GeneralizationInfo dataSourceName="file:XXX.shp" featureName="YYY"
> baseFeatureName="XXX" geomPropertyName="the_geom">
>
> YYY is the name you have to use when drawing.
>
> <Generalization dataSourceName="file:map/5.0/**XXX.shp" distance="5"
>> featureName="XXX" geomPropertyName="the_geom"/>
>> <Generalization dataSourceName="file:map/10.0/**XXX.shp"
>> distance="10" featureName="XXX" geomPropertyName="the_geom"/>
>> <Generalization dataSourceName="file:map/20.0/**XXX.shp"
>> distance="20" featureName="XXX" geomPropertyName="the_geom"/>
>> </GeneralizationInfo>
>> </GeneralizationInfos>
>>
>> the "XXX" is the filename of my shapefile.
>>
>> But when I invoke *fs.getSchema()*, it prompt "No such type : XXX". I
>>
>> suspect whether the featureName is set wrong, but I don't know how could I
>> get the featureName or baseFeatureName in my shapefile.
>>
>
> Again, orginfo is your friend.
>
>
>>
>> On Mon, Feb 27, 2012 at 11:42 PM, <chr...@nv...> wrote:
>>
>> You can use
>>> http://docs.geotools.org/****latest/userguide/library/data/****<http://docs.geotools.org/**latest/userguide/library/data/**>
>>> pregeneralized.html<http://**docs.geotools.org/latest/**
>>> userguide/library/data/**pregeneralized.html<http://docs.geotools.org/latest/userguide/library/data/pregeneralized.html>
>>> >
>>>
>>>
>>> A tutorial using shape files is here
>>> http://docs.geoserver.org/1.7.****5/user/tutorials/feature-**<http://docs.geoserver.org/1.7.**5/user/tutorials/feature-**>
>>> pregeneralized/feature-****pregeneralized_tutorial.html<h**
>>> ttp://docs.geoserver.org/1.7.**5/user/tutorials/feature-**
>>> pregeneralized/feature-**pregeneralized_tutorial.html<http://docs.geoserver.org/1.7.5/user/tutorials/feature-pregeneralized/feature-pregeneralized_tutorial.html>
>>> >
>>>
>>>
>>> I would recommend using a spatial database like postgis, using shape
>>> files
>>> has the disadvantage of duplicating all non geometry attributes for each
>>> level.
>>>
>>> Christian
>>>
>>>
>>> Zitat von Zheng Xudong <do...@gm...>:
>>>
>>>
>>> Hi all,
>>>
>>>>
>>>> I use GeoTools 8.0M4 to load a shapefile contains about 10,000+
>>>> geometries (each is a multiline). The code is just like the demo in
>>>> quickstart. But I found the rendering is a little slow, especially when
>>>> I
>>>> zoom in/out or drag the map, and even sometimes the rendering couldn't
>>>> completed (leave some blank area). What can I do to optimize the
>>>> performance of rendering, or the demo is already the best solution? The
>>>> CPU
>>>> of my PC is Core Duo E6550, the memory is 2G, and the graphics card is
>>>> ATI
>>>> Radeon HD 2400.
>>>>
>>>> Thanks and best regards!
>>>>
>>>> --
>>>> Zheng Xudong
>>>> State Key Laboratory of Software Development Environment
>>>> School of Computer Science and Engineer, BeiHang University
>>>>
>>>>
>>>>
>>>
>>> ------------------------------****----------------------------**--**----
>>>
>>> This message was sent using IMP, the Internet Messaging Program.
>>>
>>>
>>> --
>>>
>> Zheng Xudong
>> State Key Laboratory of Software Development Environment
>> School of Computer Science and Engineer, BeiHang University
>>
>>
>
>
> ------------------------------**------------------------------**----
> This message was sent using IMP, the Internet Messaging Program.
>
>
> --
Zheng Xudong
State Key Laboratory of Software Development Environment
School of Computer Science and Engineer, BeiHang University
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