feat: added min and max value to algorithms

[JinIgarashi]

@vincentsarago

Based on the discussion here (#760), I added min/max settings for algorithms parameters. I think these min/max values can be useful to create UI parts dynamically from titiler endpoint.

some parameters are straightforward to set min/max values, but some are not easy to set. Could you also check these min/max values are appropriate?

settings are shown as follow.

• Hillshade

azimuth: int = Field(90, ge=0, lt=360)
angle_altitude: float = Field(90.0, ge=-90.0, lt=90.0)
buffer: int = Field(3, ge=0, lt=99)

• Contours

increment: int = Field(35, ge=0, lt=999)
thickness: int = Field(1, ge=0, lt=10)
minz: int = Field(-12000, ge=-99999, lt=99999)
maxz: int = Field(8000, ge=-99999, lt=99999)

• TerrainRGB

interval: float = Field(0.1, ge=0.0, lt=1.0)
baseval: float = Field(-10000.0, ge=-99999.0, lt=99999.0)

/algorithms endpoint response

{
   "hillshade":{
      "inputs":{
         "nbands":1
      },
      "outputs":{
         "nbands":1,
         "dtype":"uint8",
         "min":null,
         "max":null
      },
      "parameters":{
         "azimuth":{
            "default":90,
            "exclusiveMaximum":360,
            "minimum":0,
            "title":"Azimuth",
            "type":"integer"
         },
         "angle_altitude":{
            "default":90,
            "exclusiveMaximum":90,
            "minimum":-90,
            "title":"Angle Altitude",
            "type":"number"
         },
         "buffer":{
            "default":3,
            "exclusiveMaximum":99,
            "minimum":0,
            "title":"Buffer",
            "type":"integer"
         }
      }
   },
   "contours":{
      "inputs":{
         "nbands":1
      },
      "outputs":{
         "nbands":3,
         "dtype":"uint8",
         "min":null,
         "max":null
      },
      "parameters":{
         "increment":{
            "default":35,
            "minimum":0,
            "title":"Increment",
            "type":"integer"
         },
         "thickness":{
            "default":1,
            "minimum":0,
            "title":"Thickness",
            "type":"integer"
         },
         "minz":{
            "default":-12000,
            "exclusiveMaximum":99999,
            "minimum":-99999,
            "title":"Minz",
            "type":"integer"
         },
         "maxz":{
            "default":8000,
            "exclusiveMaximum":99999,
            "minimum":-99999,
            "title":"Maxz",
            "type":"integer"
         }
      }
   },
   "normalizedIndex":{
      "inputs":{
         "nbands":2
      },
      "outputs":{
         "nbands":1,
         "dtype":"float32",
         "min":[
            -1
         ],
         "max":[
            1
         ]
      },
      "parameters":{
         
      }
   },
   "terrarium":{
      "inputs":{
         "nbands":1
      },
      "outputs":{
         "nbands":3,
         "dtype":"uint8",
         "min":null,
         "max":null
      },
      "parameters":{
         
      }
   },
   "terrainrgb":{
      "inputs":{
         "nbands":1
      },
      "outputs":{
         "nbands":3,
         "dtype":"uint8",
         "min":null,
         "max":null
      },
      "parameters":{
         "interval":{
            "default":0.1,
            "exclusiveMaximum":1,
            "minimum":0,
            "title":"Interval",
            "type":"number"
         },
         "baseval":{
            "default":-10000,
            "exclusiveMaximum":99999,
            "minimum":-99999,
            "title":"Baseval",
            "type":"number"
         }
      }
   }
}

[JinIgarashi]

@vincentsarago I added title and description based on #786
for title and description, I copied text from comments in source code, but there might be better title and description for algorithms (especially for terrarium and terrainrgb)

new response of /algorithm endpoint is shown at the below.

/algorithms endpoint response

{
   "hillshade":{
      "title":"Hillshade",
      "description":"Create hillshade from DEM dataset.",
      "inputs":{
         "nbands":1
      },
      "outputs":{
         "nbands":1,
         "dtype":"uint8",
         "min":null,
         "max":null
      },
      "parameters":{
         "azimuth":{
            "default":90,
            "exclusiveMaximum":360,
            "minimum":0,
            "title":"Azimuth",
            "type":"integer"
         },
         "angle_altitude":{
            "default":90,
            "exclusiveMaximum":90,
            "minimum":-90,
            "title":"Angle Altitude",
            "type":"number"
         },
         "buffer":{
            "default":3,
            "exclusiveMaximum":99,
            "minimum":0,
            "title":"Buffer",
            "type":"integer"
         }
      }
   },
   "contours":{
      "title":"Contours",
      "description":"Create contours from DEM dataset.",
      "inputs":{
         "nbands":1
      },
      "outputs":{
         "nbands":3,
         "dtype":"uint8",
         "min":null,
         "max":null
      },
      "parameters":{
         "increment":{
            "default":35,
            "exclusiveMaximum":999,
            "minimum":0,
            "title":"Increment",
            "type":"integer"
         },
         "thickness":{
            "default":1,
            "exclusiveMaximum":10,
            "minimum":0,
            "title":"Thickness",
            "type":"integer"
         },
         "minz":{
            "default":-12000,
            "exclusiveMaximum":99999,
            "minimum":-99999,
            "title":"Minz",
            "type":"integer"
         },
         "maxz":{
            "default":8000,
            "exclusiveMaximum":99999,
            "minimum":-99999,
            "title":"Maxz",
            "type":"integer"
         }
      }
   },
   "normalizedIndex":{
      "title":"Normalized Difference Index",
      "description":"Compute normalized difference index from two bands.",
      "inputs":{
         "nbands":2
      },
      "outputs":{
         "nbands":1,
         "dtype":"float32",
         "min":[
            -1
         ],
         "max":[
            1
         ]
      },
      "parameters":{
         
      }
   },
   "terrarium":{
      "title":"Terrarium",
      "description":"Encode DEM into RGB (Mapzen Terrarium).",
      "inputs":{
         "nbands":1
      },
      "outputs":{
         "nbands":3,
         "dtype":"uint8",
         "min":null,
         "max":null
      },
      "parameters":{
         
      }
   },
   "terrainrgb":{
      "title":"Terrarium",
      "description":"Encode DEM into RGB (Mapbox Terrain RGB).",
      "inputs":{
         "nbands":1
      },
      "outputs":{
         "nbands":3,
         "dtype":"uint8",
         "min":null,
         "max":null
      },
      "parameters":{
         "interval":{
            "default":0.1,
            "exclusiveMaximum":1,
            "minimum":0,
            "title":"Interval",
            "type":"number"
         },
         "baseval":{
            "default":-10000,
            "exclusiveMaximum":99999,
            "minimum":-99999,
            "title":"Baseval",
            "type":"number"
         }
      }
   }
}

[JinIgarashi]

@vincentsarago I just got notification email for CI. I have no idea why only 3.10 failed. Could you rerun this job for 3.10?

[vincentsarago]

@JinIgarashi it failed because of linting issue. do you have pre-commit installed?

[JinIgarashi]

@vincentsarago ah, I see. sorry I missed the info at CONTRIBUTING.md. I will install pre-commit. also, thank you for merging the PR