海口网站建设小强,网站域名费多少,怎样建设美丽中国?,设计签名主要工具
QGIS建立拓扑关系 Postgres存储数据表 Geoserver发布相关服务
QGIS建立拓扑关系
使用v.clean运行#xff0c;并用DBManager即可以建立拓扑关系并导入数据库。
注意 QGIS2.16有数据溢出问题#xff0c;使用QGIS2.14可以解决这个问题
Postgres存储数据表
导…主要工具
QGIS建立拓扑关系 Postgres存储数据表 Geoserver发布相关服务
QGIS建立拓扑关系
使用v.clean运行并用DBManager即可以建立拓扑关系并导入数据库。
注意 QGIS2.16有数据溢出问题使用QGIS2.14可以解决这个问题
Postgres存储数据表
导入wuhan_road_topo后可以进行相应处理
drop table if exists tmp_pts_topo;
create table tmp_pts_topo
as
select
osm_id
,(st_dump(geom)).geom as geom
,st_startpoint((st_dump(geom)).geom)
,st_endpoint((st_dump(geom)).geom)
,st_length((st_dump(geom)).geom)*110 as dis
from wuhan_road_topo;alter table tmp_pts_topo add column id serial;
select * from tmp_pts_topo limit 10;drop table if exists tmp_pts;
create table tmp_pts(geom geometry);insert into tmp_pts
select geom from
(
select st_startpoint as geom from tmp_pts_topo
union all
select st_endpoint as geom from tmp_pts_topo
)x
group by geom;alter table tmp_pts add column id serial; select * from tmp_pts limit 10;
select * from tmp_pts_topo limit 10;
alter table tmp_pts_topo add column start_point int;
alter table tmp_pts_topo add column end_point int;create index indx_geom_tmp_pts on tmp_pts
using gist(geom);create index indx_geom_tmp_pts_1 on tmp_pts_topo
using gist(st_startpoint);create index indx_geom_tmp_pts_2 on tmp_pts_topo
using gist(st_endpoint);select * from tmp_pts limit 10;
select * from tmp_pts_topo limit 10;update tmp_pts_topo t1 set start_pointt2.id
from tmp_pts t2
where st_dwithin(t1.st_startpoint,t2.geom,0);update tmp_pts_topo t1 set end_pointt2.id
from tmp_pts t2
where st_dwithin(t1.st_endpoint,t2.geom,0);insert into tmp_pts(geom)
select st_startpoint
from tmp_pts_topo
where start_point is null
union
select st_endpoint
from tmp_pts_topo
where end_point is null;update tmp_pts_topo t1 set start_pointt2.id
from tmp_pts t2
where st_dwithin(t1.st_startpoint,t2.geom,0)
and start_point is null;update tmp_pts_topo t1 set end_pointt2.id
from tmp_pts t2
where st_dwithin(t1.st_endpoint,t2.geom,0)
and end_point is null;delete from tmp_pts_topo where id in
(
select id from(
select id,row_number()
over(partition by start_point,end_point order by dis)
from tmp_pts_topo
where (start_point,end_point) in
(
select start_point,end_point
from tmp_pts_topo
group by start_point,end_point
having count(*)1
)
)x
where row_number1
);select *
from tmp_pts_topo
where start_point1138 and end_point1143;select count(*) from tmp_pts_topo;select * from tmp_pts_topo limit 1;select * from tmp_pts_topo where start_point10997;delete from tmp_pts_topo where start_point is null or end_point is null;
注意 要删除空白点不然无法正常运行
测试查询 选定一个起点与终点测试有没有结果
with start_point as
(
select st_setsrid(
st_makepoint(114.25,30.57)
,4326) as p
)
,end_point as
(
select st_setsrid(st_makepoint(114.23,30.56),4326) as p
)
select t2.seq,st_asgeojson(t1.geom) from
(
SELECT seq,
id1 AS node,
id2 AS edge,
cost FROM pgr_dijkstra(
SELECT id,
start_point as source,
end_point as target,
dis AS cost
FROM tmp_pts_topo,
(
select id from tmp_pts
where st_dwithin(
(select p from start_point)
,geom,0.05)
order by st_distance(
(select p from start_point)
,geom)
limit 1
)
,
(
select id from tmp_pts
where st_dwithin(
(select p from end_point)
,geom,0.05)
order by st_distance(
(select p from end_point)
,geom)
limit 1
), false, false)
)t2 left join tmp_pts_topo t1
on t1.idt2.edge
where t2.edge0
order by t2.seq;
Geoserver发布相关服务
使用Geoserver连接postgres并发布wuhan_road_topo并配置新的SQL视图SQL视图可以接收参数返回相应的视图
可参见GeoServer的SQL Views详解
将SQL语句修改为
with start_point as
(
select st_setsrid(
st_makepoint(%startLon%,%startLat%)
,4326) as p
)
,end_point as
(
select st_setsrid(st_makepoint(%endLon%,%endLat%),4326) as p
)
select t2.seq,(t1.geom) from
(
SELECT seq,
id1 AS node,
id2 AS edge,
cost FROM pgr_dijkstra(
SELECT id,
start_point as source,
end_point as target,
dis AS cost
FROM tmp_pts_topo,
(
select id from tmp_pts
where st_dwithin(
(select p from start_point)
,geom,0.05)
order by st_distance(
(select p from start_point)
,geom)
limit 1
)
,
(
select id from tmp_pts
where st_dwithin(
(select p from end_point)
,geom,0.05)
order by st_distance(
(select p from end_point)
,geom)
limit 1
), false, false)
)t2 left join tmp_pts_topo t1
on t1.idt2.edge
where t2.edge0
order by t2.seq
发布成功后可以通过修改参数如http://localhost:8080/geoserver/wuhanwork/wms?serviceWMSversion1.1.0requestGetMapviewlayerswuhan:ttstylesbbox114.22769686949,30.559729927104,114.246243846172,30.5719569775606width512height337srsEPSG:4326formatapplication/openlayersviewparamsstartLon:114.25;startLat:30.57;endLon:114.39;endLat:30.70 来访问 即可通过输入起点与终点返回最短路径 客户端实现
!DOCTYPE html
html langzh-cmn-Hansheadmeta charsetUTF-8meta http-equivX-UA-Compatible contentIEEdgemeta nameviewport contentinitial-scale1.0, user-scalableno, widthdevice-width!-- 新 Bootstrap 核心 CSS 文件 --link relstylesheet hrefhttp://cdn.bootcss.com/bootstrap/3.3.0/css/bootstrap.min.css!-- 可选的Bootstrap主题文件一般不用引入 --link relstylesheet hrefhttp://cdn.bootcss.com/bootstrap/3.3.0/css/bootstrap-theme.min.csslink relstylesheet href./css/prism.css typetext/csslink relstylesheet href./css/ol.css typetext/csslink relstylesheet href./css/layout.css typetext/csslink relstylesheet href./css/popup.csslink relstylesheet typetext/css href./css/main.cssscript srcjs/ol-debug.js/scriptscript srcjs/ol-deps.js/scriptscript srcjs/ol.js/scripttitleHomeWork/title
/headbodydiv classmycontainerdiv classrow idheaderh1Digital engineering practice/h1/div/divdiv classcontainer-fluiddiv classrow-fluiddiv classspan12div idmap classmap/divdiv idpopup classol-popupa href# idpopup-closer classol-popup-closer/adiv idpopup-content/div/div!--鼠标点击--div classbuttonlaybutton typebutton idbtStart onclickbtStart_click() data-original-titleClick classbtn btn-lg btn-default btn-check mybuttonspanClick to input start point/span/buttonbutton typebutton idbtEnd onclickbtEnd_click() data-original-titleClick classbtn btn-lg btn-default btn-check mybuttonspanClick to input end point/span /buttonbutton typebutton idselectShort onclickselect_click() data-original-titleClick classbtn btn-lg btn-default btn-check mybutton spanClick to slect shortest way/span/button/div/div/div/div
/body
script typetext/javascript
/*** Elements that make up the popup.*/
var container document.getElementById(popup);
var content document.getElementById(popup-content);
var closer document.getElementById(popup-closer);//记录按钮动作
var ableSt false;
var ableEd false;//起点经度起点维度终点经度终点纬度
var st_lon, st_lat, ed_lon, ed_lat;/*** Create an overlay to anchor the popup to the map.*/
var overlay new ol.Overlay( /** type {olx.OverlayOptions} */ ({element: container,autoPan: true,autoPanAnimation: {duration: 250}
}));/*** 加载瓦片图层**/
var source new ol.source.XYZ({url: http://localhost:8080/tilemill/{z}/{x}/{y}.png
});var center ol.proj.transform([114.2207, 30.5960], EPSG:4326, EPSG:3857);
var map new ol.Map({logo: false,layers: [new ol.layer.Tile({source: source})],overlays: [overlay],target: map,view: new ol.View({maxZoom: 18,center: center,zoom: 10})
});/*** Add a click handler to hide the popup.* return {boolean} Dont follow the href.*/
closer.onclick function() {overlay.setPosition(undefined);closer.blur();return false;
};/*** Add a click handler to the map to render the popup.*/
map.on(singleclick, function(evt) {var coordinate evt.coordinate;var hdms ol.coordinate.toStringHDMS(ol.proj.transform(coordinate, EPSG:3857, EPSG:4326));var xy ol.proj.transform(coordinate, EPSG:3857, EPSG:4326).toString();var lon_string xy.split(,)[0];var lat_string xy.split(,)[1];var lon_number new Number(lon_string);var lat_number new Number(lat_string);if (ableSt) {st_lon lon_number.toFixed(4);st_lat lat_number.toFixed(4);content.innerHTML pYou put start point here:/pcode hdms /code;ableSt false;} else {if (ableEd) {ed_lon lon_number.toFixed(4);ed_lat lat_number.toFixed(4);content.innerHTML pYou put end point here:/pcode hdms /code;ableEd false;} else {content.innerHTML pYou clicked here:/pcode hdms /code;}}overlay.setPosition(coordinate);
});/***按钮相应事件**/
function btStart_click() {ableSt true;
}function btEnd_click() {ableEd true;
}//最短路径按钮
function select_click() {overlay.setPosition(undefined);closer.blur();var getwayurl http://localhost:8080/geoserver/wuhan/ows?serviceWFSversion1.0.0requestGetFeaturetypeNamewuhan:wuhanmaxFeatures50outputFormatapplication/jsonviewparams st_lon: st_lon ;st_lat: st_lat ;ed_lon: ed_lon ;ed_lat: ed_lat;var getMywayurl http://localhost:8080/geoserver/wuhanwork/ows?serviceWFSversion1.0.0requestGetFeaturetypeNamewuhanwork:ttmaxFeatures50outputFormatapplication/jsonviewparams startLon: st_lon ;startLat: st_lat ;endLon: ed_lon ;endLat: ed_lat;var roadsource new ol.layer.Vector({source: new ol.source.Vector({ url: getMywayurl,format: new ol.format.GeoJSON({extractStyles: true}),style: new ol.style.Style({stroke: new ol.style.Stroke({color: [255, 255, 255, 1],width: 30})})})});map.addLayer(roadsource);
}
/script/html
源代码:SourceCode
