json - How to add properties to topojson file? -

-

given data.tsv file such :

id  code    name 1   al  alabama 2   ak  alaska 4   az  arizona 5   ar  arkansas 6   ca  california ... ... ...

given topojson.json file such : (the structure correct, numeral values random)

{  "type":"topology", "transform":      {     "scale": [0.0015484881821515486,0.0010301030103010299],     "translate":[-5.491666666666662,41.008333333333354]     }, "objects":      {     "states":         {         "type":"geometrycollection",         "geometries":              [             {"type":"polygon","arcs":[[0]],"properties":{"code_2":"al"}},             {"type":"polygon","arcs":[[1]],"properties":{"code_2":"ak"}}             ]         }     }, "arcs":     [         [[2466,9916],[-25,-5],[3,-13]],         [[2357,9852],[1,-2],[1,-2]]     ] }

how use common fields(1) inject values of other field(2) json file ?

1]: data.txt#code , topojson.txt.objects.states.geometries.properties.code_2

2]: data.txt#name

the end result should contains :

            {"type":"polygon","arcs":[[0]],"properties":{"code_2":"al", "name":"alabama" }},             {"type":"polygon","arcs":[[1]],"properties":{"code_2":"ak", "name":"alaska" }},

edit: accepted answer:

topojson -o final.json -e data.tsv --id-property=code_2,code -p code_2,state=name -- topojson.json

try using this:

topojson -o final.json -e data.tsv --id-property=code_2,code -p code_2,state=name -- topojson.json

which should output:

{     "type": "topology",     "transform": {         "scale": [             0.000016880209206372492,             0.000007005401010148724         ],         "translate": [             -1.8418800213354616,             51.15278777877789         ]     },     "objects": {         "states": {             "type": "geometrycollection",             "geometries": [                 {                     "type": "polygon",                     "arcs": [                         [                             0                         ]                     ],                     "id": "ak",                     "properties": {                         "code_2": "ak",                         "state": "alaska"                     }                 }             ]         }     },     "arcs": [         [             [                 0,                 588             ],             [                 92,                 -294             ],             [                 91,                 -294             ],             [                 -183,                 588             ]         ]     ] }

from command line reference wiki:

--id-property name of feature property promote geometry id

by using code_2 property option, promote feature id.

prepend + in front of input property name coerce value number.

plus:

if properties referenced --id-property null or undefined, omitted output geometry object. thus, generated objects may not have defined id if input features did not have property specified name.

so, when using +code , +code_2, undefined, can't convert ak string value number.

here, input property "fips" coerced number , used feature identifier; likewise, column named "fips" used identifier in csv file. (if csv file uses different column name feature identifier, can specify multiple id properties, such --id-property=+fips,+id.)

that's why have add code --id-property=code_2,code option. how mapping made (the code_2 topojson.json , code column data.tsv).

then, output property "unemployment" generated external data file, unemployment.tsv, defines input property "rate"

in our case, -p code_2,state=name specifies preserve code_2 property , rename name property state. properties , external properties sections in aforementioned documentation wiki pretty informative on matter.


Comments

Post a Comment

Popular posts from this blog

java - activate/deactivate sonar maven plugin by profile? -

-
i use sonar plugin executes if activated in maven profile. sonar runs on every compile. the problem build fail other team members not have sonar application installed locally. pom.xml checked in team members same copy including sonar configuration, don't want them modify purpose of disabling sonar (they might inadvertently check modified copy in). please advise how configure maven (.m2/settings.xml) and/or pom.xml sonar feature can enabled/disabled local profile. here sonar configuration in each project's pom.xml: <plugin> <groupid>org.codehaus.mojo</groupid> <artifactid>sonar-maven-plugin</artifactid> <version>1.0</version> <executions> <execution> <id>make-sonar</id> <phase>compile</phase> <goals> <goal>sonar</goal> </goals> </execution> </executions> ...
Read more

python - TypeError: can only concatenate tuple (not "float") to tuple -

-
i'm new python, question might easy, anyway, patience: as trying call newton-raphson method calculate implied volatility in black-scholes formula call/put option pricing, first thing is, newton method in scipy.optimize seems calculate function's zeros, in black-scholes formula, want function's value option price, not zero. (i'm new here programming, i'm not sure techniques.) should write function things like: def f(sigma, price): return bsformula(s0,k,r,t,q,sigma) - price then, while calling newton method, takes args=() 1 parameter in function, write this: value = newton(bsprice2, 0.5, args=price) but error message: file "bs.py", line 36, in bsimpvol value = newton(bsprice2, 0.5, args=float(price)) file "/usr/lib/python2.7/dist-packages/scipy/optimize/zeros.py", line 143, in newton q0 = func(*((p0,) + args)) typeerror: can concatenate tuple (not "float") tuple could tell me why that? how fix it? apprecia...
Read more

java - What is the difference between String. and String.this. ? -

-
this question has answer here: meaning of .this , .class in java 2 answers i'll straight point. im still learning bit of syntax , want know difference between code is code a: public class buttonz extends jbutton{ public buttonz(){ settext(new string(string.valueof(i))); } } please ignore fact i undeclared, not lost. code b: public class buttonz extends jbutton{ public buttonz(){ settext(new string(string.this.charat(i))); } } what don't yet understand difference in typing string.this , string. i under assumption when use dot operator on class accessing it's static methods(and/or variables if they're not hidden). i have studied little bit , have concluded when using string. accessing string static methods.. when using string.this. i'm accessing methods class buttonz extendi...
Read more