# Elevation profile of a route or GPX track: climb and descent

**Use case:** 

Elevation every 500 m along the 91 km Great Ocean Road drive from Torquay to Apollo Bay, from an encoded polyline. Returns about 180 samples with distance along the road and metres above sea level, plus the lowest and highest point and the total climb and descent, ready to chart or to feed a cycling or EV range plan. One $0.001 lookup for the whole line.

## Input

```json
{
  "origin": "Torquay VIC",
  "destination": "Apollo Bay VIC",
  "profile": "car",
  "mode": "elevation",
  "elevation": [
    {
      "id": "great-ocean-road",
      "polyline": "b__iFsp{oZuAxAABCD?F?F@D@DBDBDHBH@D?D?F?HENKFADAFAFAH@H@HDNRo@\\o@\\[HOBADAFCBCB@NAHATQbCIbACZCj@I`AIvAKpAAZKj@C^KpBKlBEt@DJFTBB?F?FADCDARAN@BFZb@fBDTBF@J?P?JEVELEPENEHEJEJEHAFCFAD?DADAP@DJRHNFHDJFHBJFNDNBNBNBPBR@N@N@X?T@ZBnAB\\Ff@DTF^FXRx@j@xAl@zAx@vBTv@P|@Fx@Bd@@\\?J?Z?^?d@EbAWdDOhCAVKjBInAm@tLAp@CzA?t@@b@AlCEz@M|CSjDkAxRSdDCf@Af@Aj@?f@?l@@h@Dl@Bh@Fh@Ff@Hn@Lr@~BnKNt@NfA@J@F@LFn@Bh@Bh@Bp@@z@?x@Ev@MxB[~Eg@hIM~BGbAOhCOdCeAhQSbDq@rLs@zK{ArWMtBMvBCn@At@Al@@l@Bn@@h@Fl@Hr@NfAp@lFb@fDFb@bAzHRxAN~@X~BVfBHd@Jd@N`@N`@NTHPJNHLHFJ@HDFJBJHPPRTNRJ\\L`@Jd@H\\BRD\\FZBr@BfBFzJZ`CFjADpADnAFrAPF@x@Lr@Pn@Rv@Xt@\\p@^r@`@h@`@f@b@`@^f@d@\\`@^d@\\d@`@n@Zj@R`@h@fA`@`Ab@rAd@tA~HdW~@tCTl@Xn@Vj@Xh@Zd@`@j@`@b@`@b@b@^b@\\\\T`@Rb@TpGvCtFfChJhEpD`BnObHhAd@v@Zn@Th@Ph@Lb@Hh@J~@LbLpAhKlAxC^hOzBzBbAtCfCvA|B|@~Bj@rCNtAFd@H~BEtBKxB}ArVk@nIQbCWzEGzAEfBFzBJrBVjB`@nBnB|HfExP~ApGjF~SfCbKvAvFFVLf@V|@r@vCNj@nDtN^|AfC~JVz@Lf@v@~BNf@LT\\`@JDFBFJBJh@p@\\h@TJZNj@Ph@Hf@@h@An@Il@Op@[l@_@~CyC|@s@dAm@r@Qt@Ir@?z@Jx@Vn@Xp@f@f@f@j@dAdA~BtAvDVh@`@r@Z^f@`@^Tb@Pv@VbAFr@Av@Mh@O~Bw@x@Qr@Eh@DN?h@Jt@RZNZThDdCxEhDr@r@Zd@~EvJd@t@j@l@l@d@pLdGVJ`@TfCtA^RnBtAfAv@ZV^^V\\\\j@b@v@`@|@Zp@Vv@j@tBRj@Zn@f@t@j@t@nAfAj@f@f@p@j@x@^Zb@Xx@Vn@LlAT`@NFFHHNTNVN^F\\Db@@b@Cf@Cj@APChB?JAp@?\\@T@JBJDNDNBJD@DFBFBF?HAFADBf@B\\F`@DTDRFXBDTf@R\\Xd@V^Z\\`@Zj@^r@b@x@d@VLTHVF\\D^BZ?VARAhAGDAj@EvAMx@Ip@Gb@GXGZIRIRKROz@q@|AsA~@y@\\[r@q@LKDE@?FGFGRONGVGPARAVBPDVJLJDBLPLRJXFXHb@Jp@NnATxAHZb@zBJb@H\\L^JXLVr@hAzBxCxGzIRXNXHRDPF\\h@tDHh@DVHf@BZ@`@A\\Gd@Gf@E^?\\BXBVJZLTLLNNPHTFTB\\B^DNDPFPJNNLNV^R^Vn@Pr@XdADRHNPX\\^l@d@d@^r@r@^h@d@~@fBpEVl@Xj@Xd@V^VZr@p@ZR\\Rt@\\x@b@p@`@h@`@|ApAzFxE|@z@v@bA~CtETZRXjAfBR^Th@Tn@ZdAx@vC|BhIJf@Jt@LhAHzAJnAD~@FjADfA@`B@tJ?z@C`AMvBAv@@t@FjAN~BDlAD`BFhBBp@Hr@Jn@R~@d@rBb@dBP~@RjANtAJfAHx@Fx@FdAJrCHrBJpCDvADtADt@Dz@TfERzDDfABx@@x@?p@Br@Dz@Fl@Jh@Pt@L^n@|ARj@Pj@Hb@Jd@Fd@Fd@Dj@Dp@F|@Db@Hn@Pz@J^Nh@Vt@Pn@Nl@RfAPfARxAL`AHv@F|@HnBHzAFn@Lr@Jf@Rl@Rb@Zp@nAfC`@|@Zt@Vz@R~@P`AJ`A^vCd@~Ct@dELf@Nb@P\\NVV\\VXVV^TXNd@Pb@Hx@Jp@LTFd@Rj@Xb@^`@b@^d@Xj@Vl@Nh@Ll@Jt@f@rELt@Pp@Tr@Vh@T^b@l@j@l@dAr@x@h@b@`@^`@`GlIf@l@`@d@b@^b@\\^Tb@Th@VnK|Dl@Vd@Th@^~AvAdBxA`@^^b@\\f@t@pAd@x@^b@^`@`@ZfAt@tDlClDtBxAhALHd@d@jCtCpFvFt@v@LLhExElGzGd@d@ZVb@Zr@b@PH|@\\\\HLBZDbALb@FnFp@lEd@|C`@VBVDXHRHr@`@t@j@LFbAr@`Ap@t@f@v@h@xCrBZXRTV\\NZNZL\\Rz@V|AVbBDt@Bl@?n@?b@B`@B^F`@H\\FVN^^t@`A|AV^T^f@~@Pj@FZDVBTDf@Ap@Ep@Ov@c@tAc@|AWzAOtAKlBCdABlADn@Fj@Fd@Jj@XfAv@~BRj@d@tALXNZNXX^LNRTTRPLVLRJZPd@^\\\\NPV\\NVR`@N`@LZL`@Jd@Hb@Fl@TvELfCBr@@j@?d@Ah@EbAEhA?j@Bj@Bb@D`@J~@JbAFfA@f@@X?R?rAA`BAvAArDCpI?`H?|@@pEDfFJjNF`EJhDBdAVjLFzC?j@Af@E`@G^e@rBG\\AZ@^@b@Hf@Px@XhAJn@Hr@Ft@PnCDf@BZPtAz@hFHj@Hn@Hv@JdANbBPtBH|AJzBDx@^hJBn@B^Dl@HjATzBj@tFHx@d@fDZ~BJz@Fz@Fn@BZHnAJ`BJrAFhABl@Bt@BlA@h@@n@FlAL|ALtARrADVd@bCrApFFTNl@X`A\\rAl@lBb@nANb@Nd@V`A^bBXfANp@Nd@h@xA\\x@Vn@Rp@^nAp@dCb@lA`A`CNZTf@\\p@Zj@n@|@p@`At@dAp@`A`AnAb@f@~@t@f@`@l@\\\\Pf@Nt@Lj@HzADfBB`@CZEVKNITUX]T[LMLIPEP?RDPJPNRVR^Tj@^v@R`@LRHRDN@PANCNENKRIJOJUNONIPETETA\\?pA?r@?jA@`@BXDTHTJTJRX`@t@`AJRFRDRBRATARGRKROTWVMNIRERE\\A\\?v@?b@Cf@I`@KTMRKHEBSHYBi@BMBSDQNKTGRA\\B\\JZJNLJVFP@ZCTEh@Sr@_@PGRCP?L@~@RRDT@V@VCv@SNCLBJDLLHPH^Df@Hp@LvAD\\@X?PCTGTI`@EXCZ?ZD`@j@bDHVLRLLRLTFNBNANELIFQDUASGSS[OUKQM_@EWE]A]Da@Jk@F[H]D_@@[@a@C_CBeE?gAB{@Fq@Lu@JYL[f@kAt@iBTo@La@N[JMLKJGPGVGh@KPAP?NDNHJLVd@n@xAL`@Tx@Xz@Rj@Pp@R`AF\\FVHPNTTZPZ|@bBn@nAHVJ`@H`@FTJVJRVTRPNLNPRZHRHTBPDT@^Bd@B\\FVHPLNVPTTLRJTDRDRBX?XA^K|@MnACf@Ah@@~@Bd@Db@LbAZtBTpAFTJRJHTJh@LRFRLNTJXHZH\\BZDf@BZDVHRLPRNv@b@d@TXNVHTBX@\\?\\@\\DXFVJd@XzBjB`@`@PVL\\J^@\\?h@?h@H`@LVNLJFPDZ@^AVAX@\\H~@\\l@T^RTPRVNZHTNb@`@hALd@HNJVLNTLVJxBl@THTJNPJRFT@\\CZGVIRKLOH_@NQHULSVM\\I^Cb@?d@RzBDZFPJNPFR?RIJMFU@SE[G]AW?MDOHMHGHAHAR?ZBT?RCPGVMVQTGT@THTPZZT\\Xf@Rd@Tr@Nn@Lt@Lf@P`@R`@Xb@v@bAZj@N`@Pj@Lb@N\\TZZZ`@\\l@\\b@T`@Nj@Ll@Hx@Fj@?^Ad@I^E\\Af@Dt@L`B^ZHd@NVNl@b@n@d@`@Zl@\\x@\\t@Xl@Rt@Nn@Ft@?p@?f@Fn@NVLPJPLLLPVT\\V\\RVj@p@r@t@RNNLTLVHXLNNTXZj@Rf@Th@Nl@Lj@Jd@J\\PXV`@N\\H\\DZ?`@?b@@\\DZHVHTLRPPPJXJ\\Fn@JVJVN\\XTR^b@VXRTRTNRPXZh@TZ`@f@l@p@h@j@l@j@p@r@|@~@z@~@j@f@v@t@dA`AjAfAr@n@j@b@v@h@t@p@l@p@\\b@d@n@Z`@NXN\\L`@Jj@Ld@N`@P^TZVZl@h@\\ZRXT`@h@pAVd@XZXXd@^j@`@VLb@RJFJDVJRLXRZ^`@h@V\\PPXVn@^l@\\jAx@jDdC|@p@r@l@j@\\ZN`@Lp@TrA`@j@Tb@VRNNLVTjApAFFx@t@~@x@b@b@PRNTV^l@dANTHHNLTPXLfAd@h@VTJRJVNjAdAnAdAfDxC~DlDbAx@r@t@l@z@pAhBv@hAZh@lA`C^dAl@nANLNTPTFNFLJNDFD?DBBD@D@FFVBPDRN\\LVNLj@t@JXr@`A\\b@`@h@HJJJJ@D@B?FARGNOZ]NWHQJU@GBEBEDAD?B@ROZSx@aAZ]h@q@PQNGPERCjAOv@Gx@ErBHzBJz@AjAKtAEn@CvAKRCPIRM^_@AG@GDEDCB?FBh@c@v@q@VYN[Tu@b@wEBUFa@DY^aA`@aAh@gB~AkFL_@T]n@s@\\i@T]Zo@n@cB^w@pAsBn@cA~@oBd@eA^y@Nk@Vy@J_@HQFMNKLGLCN?R@xD\\vBTh@Ff@FhDb@VFZJRJVNRTVXn@z@FFNRVRZTVLVJRH^FZDR@^BT@NBJDJDFFHJJLFNRTNPHFHJJHLLJJFLFNFPNb@DNDNFJBFJJl@b@PPNTJRDHDHBPDPBNLzBDd@BXBXBTDNTjAJh@DVFXHXDRBT@XBr@Bh@LtB?\\AVGRKRQJSDg@@wAEe@BSDUFSRKTIXAZ?XBRHRLPPJNDLDpALT@PBTJVTh@|@^f@\\Xf@Jj@Cb@CZMVOV[Zm@Ti@J]@ODMDWJMPKRCP@\\LPDN@N?ZCT?N?RDVPJFPLTFVFlAVR@XA`@Ex@Kf@EVERGRK^QPGLERAN?RANALBJDHFJLVn@NNNJPHb@TVLZPVNdAj@XPj@XTNLPn@p@XRp@`@p@XPDTB`ABV?THNJRXVTPJRHVF\\FZLRNLNZl@~@rBLb@H^VtBFVVv@J\\Hn@N`BBj@Bd@Ff@FXL\\JXHTH`@Dl@DfA?`@CXAPWj@ORo@n@QZIXE`@?X@TL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      "polylinePrecision": 5,
      "intervalM": 500
    }
  ],
  "geometry": "all",
  "steps": "instructions",
  "units": "km",
  "language": "en-GB",
  "elevationIntervalM": 0,
  "geocodeCountry": "AU",
  "looseGeocoding": false,
  "concurrency": 4
}
```

## Output

```json
{
  "input.id": {
    "label": "ID",
    "format": "string"
  },
  "status": {
    "label": "Status",
    "format": "string"
  },
  "inputPoints": {
    "label": "Input points",
    "format": "integer"
  },
  "intervalM": {
    "label": "Interval (m)",
    "format": "number"
  },
  "summary.lengthM": {
    "label": "Length (m)",
    "format": "number"
  },
  "summary.minM": {
    "label": "Min (m)",
    "format": "number"
  },
  "summary.maxM": {
    "label": "Max (m)",
    "format": "number"
  },
  "summary.gainM": {
    "label": "Climb (m)",
    "format": "number"
  },
  "summary.lossM": {
    "label": "Descent (m)",
    "format": "number"
  }
}
```

## About this Actor

This example demonstrates how to use [Directions, Routing & Distance Matrix API — no API key](https://apify.com/davidar/openstreetmap-directions-api.md) with a specific input configuration. Visit the [Actor detail page](https://apify.com/davidar/openstreetmap-directions-api.md) to learn more, explore other use cases, and run it yourself.


## How to integrate an Actor?

This Task's input is already configured above. Use it as-is rather than inventing a new one.

Do not guess an integration path. Every one of them is in the agent quickstart at https://apify.com/agents.md: the Apify MCP server, Agent Skills with the Apify CLI, the JavaScript and Python clients, the REST API, and the account-free path for an agent with no human to sign in. It also carries the rule on stating cost before the first paid run.

For full API examples (JavaScript, Python, CLI, MCP, OpenAPI), see this Task's Actor page: https://apify.com/davidar/openstreetmap-directions-api.md

Each client library has reference documentation the quickstart does not restate: [JavaScript/TypeScript](https://docs.apify.com/api/client/js/docs.md) (`npm install apify-client`) and [Python](https://docs.apify.com/api/client/python/docs.md) (`pip install apify-client`).