首页 \ 问答 \ 在另一个插件中使用qgis核心插件(Useage of qgis core plugin in another plugin)

在另一个插件中使用qgis核心插件(Useage of qgis core plugin in another plugin)

我正在尝试在QGIS中开发一个插件,其中导入数据作为点,我希望将点插入到多边形,然后对多边形运行分析。

如果我停止我的插件,使用qgis核心工具“Interpolate”,然后运行我的分析,它的工作完美。 但有什么办法可以导入Interpolate工具并自行提供工具? 就像是:

from qgis.core.??SOMETHING?? import interpolate

interpolate(InterpolateLayer, InterpolateMethod, numberOfColumns, numbersOfRows etc. etc.)

如果有任何方法我可以使用postgis替代? 我试过了:

select st_delaunaytriangles(pos, 0.001, 1) into new_table from table_with_point_as_pos

I am trying to develop a plugin in QGIS where import data as points, I would than like to interpolate the points to polygon and then run an analyse on the polygons.

It works perfectly if I stop my plugin, use the qgis core tool "Interpolate" and then run my analyse. But is there any way that I can import the Interpolate tool and feed the tool my self? Something like:

from qgis.core.??SOMETHING?? import interpolate

interpolate(InterpolateLayer, InterpolateMethod, numberOfColumns, numbersOfRows etc. etc.)

Alternative if there is any method that I can use from postgis? I tried:

select st_delaunaytriangles(pos, 0.001, 1) into new_table from table_with_point_as_pos

原文:https://stackoverflow.com/questions/37700806
更新时间:2019-11-21 10:10

最满意答案

我终于搞清楚了!

import processing
GRASS_REGION_PARAMETER = '%f,%f,%f,%f'% (min_lon, max_lon, min_lat , max_lat)
processing.runandload("grass:v.voronoi", path_and_file_name_point,False, False, GRASS_REGION_PARAMETER, -1, 0, 3, path_and_file_name_poly)

我在获取GRASS_REGION_PARAMETER的正确格式时遇到了很大的问题。 我最后有一个额外的空间导致没有创建多边形文件( "= '%f, %f, %f, %f '%"等而不是"= '%f,%f,%f,%f'%"等)

现在唯一的“问题”是,用100k +点运行这个过程需要相当长的时间。


I finally figure it out!

import processing
GRASS_REGION_PARAMETER = '%f,%f,%f,%f'% (min_lon, max_lon, min_lat , max_lat)
processing.runandload("grass:v.voronoi", path_and_file_name_point,False, False, GRASS_REGION_PARAMETER, -1, 0, 3, path_and_file_name_poly)

I had huge problems with getting the correct format for GRASS_REGION_PARAMETER. I had an extra space in the end which resulted in that no polygon file were created ("= '%f, %f, %f, %f '%" etc. instead of "= '%f,%f,%f,%f'%" etc.)

The only "problem" that remains now are that it takes rather long time to run the process with 100k+ points.

2016-07-01

相关文章

更多

最新问答

更多
  • jsPlumb draggable element javascript函数(jsPlumb draggable element javascript function)
  • MVC4:ViewModel(带有radiobuttonlist)在HttpPost之后为空(MVC4: ViewModel (with radiobuttonlist) is empty after HttpPost)
  • 如何在同一帐户上设置“Dev repo”(在prod和团队之间)(How to set up a “Dev repo” (between the prod and the team) on the same account)
  • 如何在tcl中将eth0配置为发送方udp端口(how to configure eth0 as a sender udp port in tcl)
  • 如何在datarow []中的列中找到最大值?(How to find max value in a column in a datarow[] ?)
  • 如何使用预定义文本替换来自数据库的部分结果(How do I replace part of result coming from Database with predefined text)
  • Selenium Java注入了新的Javascript函数(Selenium Java inject new Javascript function)
  • 使用.on的多个下拉菜单选择文本仅适用于第一个下拉列表(Multiple Dropdowns Menu Selection text using .on works only on first dropdown)
  • 快速将黄土曲线添加到大型数据集图中的方法(Quick way to add loess curve to large data set graph)
  • FilteringSelect in mvc(FilteringSelect in mvc)
  • 在Delphi XE2中开发Mac或iOS应用程序需要哪些硬件/软件?(What hardware/software is necessary to develop Mac or iOS apps in Delphi XE2?)
  • 在原型的构造函数中初始化属性时获取“未定义”(Getting 'undefined' when a property is initialized in the constructor of a prototype)
  • 通过越狱加载的应用程序的Documents文件夹位置(Location of Documents folder for an app loaded via jailbreak)
  • 在OpenGL中使用可编程和固定管道功能(Using both programmable and fixed pipeline functionality in OpenGL)
  • 将任何用户输入重定向到单独的底层程序(redirect any user input to a separate underlying program)
  • 编辑文本不能正常工作android(Edit texts not working properly android)
  • “user_denied”Facebook应用页面上的Facebook用户区域设置(Facebook user locale on “user_denied” facebook app page)
  • 在大图像中找到小的部分透明图像的坐标(find coordinates of small partially-transparent image within a large image)
  • 我如何在cakephp 3.1中获得完整的相对路径?(How i can get full relative path of image in cakephp 3.1?)
  • 如何保存拖动标记的新本地化?(How to save new localization of dragged marker?)
  • MySQL UPDATE vs INSERT和DELETE(MySQL UPDATE vs INSERT and DELETE)
  • 在执行查询之前,在SQLAlchemy模型中将datetime转换为unix时间戳?(Convert datetime to unix timestamp in SQLAlchemy model before executing query?)
  • OpenCL与OpenGL互操作的优势(Advantage of OpenCL interoperability with OpenGL)
  • 如何解析用点和等分隔的数据然后添加到listview(How to parsing data from delimited with dot and equal then add to listview)
  • 带调试输出的X3解析器段错误(BOOST_SPIRIT_X3_DEBUG)(X3 parser segfaults with debug output (BOOST_SPIRIT_X3_DEBUG))
  • 将文件夹名称添加到fgrep结果(Add folder name to fgrep result)
  • 在MySQL中加载一个表是非常慢的(Loading one table in MySQL is ridiculously slow)
  • 如何将JSON放入PHP变量?(How do I put JSON into a PHP Variable?)
  • 如何绕过Microsoft.Speech.Recognition中的不流畅?(How to bypass disfluencies in Microsoft.Speech.Recognition?)
  • 原点的最后一行是什么?(What is the last row of an origin for?)