Skip to main content

What is Andmap View

A view is one set of data. User might create a view of only pipelines and / or fittings, or filter by date. 



When need create a view?

  1. save Andmap Data to shapefile, kml, gpx, csv or ...
  2. download data to mobile device, data in published views can be downloaded to mobile device
How to create view? in Data Editor

For Shapefile, be sure create View for each feature type. Can't save to Shapefile when View has multiple feature types.








Popular posts from this blog

useRef in store.subscribe, re-render

const Dashboard : React . FC = () => { const store = createStore ( countReducer ) const divRef = useRef < HTMLDivElement >( null ); store . subscribe (() => { const state = store . getState () if ( divRef . current ) divRef . current . innerText = `this is cool, another listener: ${ state . count } ` ; }) return ( ... < button onClick = { () => store . dispatch ({ type : ActionType . INCREMENT }) } > add </ button > < button onClick = { () => store . dispatch ({ type : ActionType . DECREMENT }) } > minus </ button > < div ref = { divRef } > 0 </ div > ... ) } Re-Render: const count = useRef ( 0 ) ; useEffect ( ( ) => { count . current = count . current + 1 ; } ) ; return ( < > < input type = " text " value = { inputValue } onChange = { ( e ) => setInputValue ( e . target . value ) } /...

setup prettier / eslint for create-react-app typescript

1. npm i -D prettier  2. create .prettierrc.json { "trailingComma": "all", "tabWidth": 2, "singleQuote": true, "jsxBracketSameLine": true,    "semi": false } 3. npm i -D eslint-config-prettier 4. in package.json, add this: "eslintConfig": { "extends": [ "react-app", "react-app/jest", "prettier" ] }, 5. install extension in VS Code Prettier extension

Big-Oh (O) Notation, and sorting in Javascript

Asymptotic notations are classified into three types: Worst case time complexity : It is a function defined as a result of a maximum number of steps taken on any instance of size n. It is usually expressed in  Big O notation . Average case time complexity : It is a function defined as a result of the average number of steps taken on any instance of size n. It is usually expressed in  Big theta notation . Best case time complexity : It is a function defined as a result of the minimum number of steps taken on any instance of size n. It is usually expressed in  Big omega notation . Space complexity : It is a function defined as a result of additional memory space needed to carry out the algorithm. It is usually expressed in  Big O notation . Big-Oh (O) notation Big Omega ( Ω ) notation Big Theta ( Θ ) notation Default sort() in JavaScript uses  insertion sort  by  V8 Engine of Chrome  and  Merge sort  by  Mozilla Firefox  and...