postgis in action

Tags: img http file. NET installation file DMI win scene blank1. Download PostgreSQL (open source database, recommended by GIS Industry) here (https://www.bigsql.org/postgresql/installers.jsp/); 2. Download the PostGIS (PostgreSQL database GIS spatial database plugin) corresponding to PostgreSQL version (http://winnie.postgis.net/download/windows/pg94/) here. 3. The pgrounting (Spatial database path analysis plug-in) can be found under the second step

PostgreSQL and PostGIS are installed in two main ways, from source installation and package management tool installation, recommended to install with package management tools, the following is the specific steps installed on the CentOS 7.1 X64 Install Yum repository.The repository of PGDG (PostgreSQL Global development Group) is recommended, and this repository includes the official latest PostgreSQL and matching

What formats of spatial data can be imported to postgis? There must be a lot of data. My data source is in the SHP format. After installing the postgis module, I directly choose postgis shapefile and DBF loader. If you are using other formats you can go to SHP and then export, of course you can also direct, direct export there is such a tool ogr2gui (http://sourc

This article briefly records how to import and export common data involved in PostGIS. 1. Import osm data to PostGIS Osm2pgsql-c-d osm-l-E 4326-S/usr/share/osm2pgsql/default. style xxxxx. osm Here, pay attention to a few parameters. Whether to choose-c or-a depends on your application method.-S is not used in the path of Ubuntu, and espg can no longer use 900913. Naturally, it is best to make the database a

_ Author _ = 'admin' # encoding: utf-8import sysimport datetimeimport mapnikm = mapnik. map (256,256, "+ proj = latlong + datum = WGS84") # M. background = mapnik. color ('pipelineblue ') # Set background color to 'pipeline '. S = mapnik. style () r = mapnik. rule () polygon_symbolizer = mapnik. polygonsymbolizer (mapnik. color ('pink ') R. symbols. append (polygon_symbolizer) line_symbolizer = mapnik. linesymbolizer (mapnik. color ('rgb (50%, 50%, 50%) '), 0.1) R. symbols. append (line_symboliz

1. Software DownloadPostgresql-9.6.1-1-windows-x64-binaries.ziphttps://www.postgresql.org/download/windows/Postgis-bundle-pg96-2.3.1x64.ziphttp://download.osgeo.org/postgis/windows/pg96/2. Unzip the Postgresql.zipUnzip the postgresql-9.6.1-1-windows-x64-binaries.zip to the installation directory you want (D:\GreenSoftware\PostgreSQL961), it is best not to have Chinese or space,3. Create a data storage direc

Postgis (http://postgis.refractions.net/) is an extension of spatial data of Object Relational Database System PostgreSQL.Postgis provides the following Spatial Information Services: spatial objects, spatial indexes, spatial operation functions, and spatial operators. Postgis complies with OpenGIS specifications. How does PostgreSQL expand its space? Let's compare it with ArcGIS: See the

Python accesses PostGIS (Table creation, spatial index, partition table), pythonpostgis # Encoding: UTF-8 _ author _ = 'admin' import psycopg2import ppygisimport datetimeimport stringimport sysimport loggingimport GeowayLoggerreload (sys) # Chinese error sys. setdefaultencoding ("UTF-8") vLog = GeowayLogger. geowayLogger ("c: // geoway2.log", logging. DEBUG) vLog. start () # postgis # pgisCon = psycopg2.con

Label:Prepare a line SHP data and import it into the postgres inside, postgres install PostGIS and pgrouting two plugins (see http://www.cnblogs.com/nidaye/p/4553522.html for a method). The fields of the line data are as follows: note the name of the field, save the unnecessary hassle of appearing. 1, ALTER TABLE beijing_line ADD COLUMN source integer; ALTER TABLE beijing_line ADD COLUMN target integer; ALTER TABLE beijing_line ADD COLUMN length doubl

Openlayer+geoserver+postgis is the most common open source GIS solution, and editing features is one of the most common operations in GIS. This paper explains the problems of using Openlayer to make use of geoserver editing features to PostGIS. One, the spatial database PostGIS attention problem 1. The data table to be edited in

???? No mistake, the vector slices are calculated using PostGIS. Before that, prepare a data: A GIS data table (point data of 1 million in this case, coordinates: 4326), and add X, y fields to the table to facilitate subsequent data filtering. The SQL uses theST_ASMVT and St_asmvtgeom.???? Creating a vector slice in this article is simple, using one of the following SQL to run the results like. Then write a vector slice of the HTTP service (refer to G

Label:ways to create a database with PostGIS functionality 1. Check the default created GIS library when installing 2. Create a new database to execute create extension PostGISCreate a table with a Geography type column 1. First create a table that does not contain a geographic column CREATE TABLE public. " Station_address "("ID" character (.) is not NULL,"Create_station_code" character varying (50),"Coordinate_value" character varying (200),"Point" t

Tags: integer 2.0 finishing Har blog set between Sha directoryPostGIS installation using PostgreSQL in the bin directory under Stackbuiler PostGIS 1. Build the Table statement: Create Table not NULL 4326 NULL ); The field geometry represents the point of the three-dimensional space, and the two-dimensional points will be Pointz instead of the createtablenotnull 4326　　null); The field geometry represents the line of three-dimensional space, similarly,

. You can connect and publish data on this page. 2 Geographic Information data import and publication In this paragraph, the author will use the Chinese 2014GDP data as an example for the publication of data. For the import of geographic information data, you need to use a spatial database. In this article, the author uses Postgresql+postgis to accomplish this task. Next, you'll learn more about importing data.

#!/usr/bin/env python#-*-coding:utf-8-*-ImportPSYCOPG2ImportJSON fromGeojsonImportloads, Feature, featurecollection#Database Connection InfoDb_host ="localhost"Db_user="Pluto"db_passwd="stars"Db_database="PY_GEOAN_CB"Db_port="5432"#Connect to DBconn = Psycopg2.connect (Host=db_host, user=Db_user, Port=db_port, PASSWORD=DB_PASSWD, database=db_database)#Create a cursorCur =conn.cursor ()#The PostGIS buffer queryBuffer_query ="""SELECT St_asgeojson (St_t

When the development environment changes, or the development completes the project site implementation, the Operation dimension, often will face the data and the service migration, this includes the spatial data as well as the GeoServer service migration work.Here is a reminder: If you are using a similar open source Webgis technology solution, it is recommended that the software environment be consistent before and after the migration to avoid some unexpected problems.Spatial data (

This paper describes in detail how to supermap the PostgreSQL spatial data to extend PostGIS engine data.First, software download1, installation PostGIS must first install PostgreSQL. The 9.5.1-1-x64 version is used in this articlePostgreSQL installation package link Http://pan.baidu.com/s/1nvkORmL Password: ixot2, Postgis_2_3_pg96.exe installation process to select the download.Second, the software install

#encoding: utf-8__author__ = ' Administrator ' import psycopg2import ppygisimport datetimeimport stringimport sysimport Loggingimport geowayloggerreload (SYS) #中文错误sys. setdefaultencoding ("Utf-8") VLog = Geowaylogger.geowaylogger ("c:// Geoway2.log ", logging. DEBUG) Vlog.start () #postgis #pgiscon = Psycopg2.connect (database= "Postgis_21_sample", user= "Postgres", password= "") Pgiscon = Psycopg2.connect (database= "Postgis_21_sample", user= "Postg

Tags: PostgreSQL postgis optimizationFirst, the table structure definition--Table:public.tbl_buildings--DROP TABLE public.tbl_buildings;CREATE TABLE public.tbl_buildings(ID character (7) not NULL,Name character (20),Type character (10),Address character (30),The_geom geometry,CONSTRAINT Tbl_buildings_pkey PRIMARY KEY (ID))Column ChangesSELECT dropgeometrycolumn (' tbl_properties ', ' The_geom ')SELECT addgeometrycolumn (' tbl_properties ', ' The_geom

In my spare time, I learned about pgrouting's path calculation for Directed Graphs, There is an article on the official website to deal with the "one-way" path computing: http://www.pgrouting.org/docs/howto/oneway.html Next I will prepare a map of Wuxi for relevant learning: This is not an introduction to software installation. The optimal path of the software version used is the same as that of Introduction to postgis. The map data on my hand is i