TiSrv

TiSrv is a tile server that try to implement OGC API – Tiles, currently only vector tile is supported.

The following OGC API – Tiles comformance classes are implemented: Core, TileSet, TileSets List, Geo Data Resource Tilesets.

TiSrv is built on top of these software: FastAPI, morecantile, asyncpg. And special thanks to pg_tileserv for its excellent SQL template.

How to run

Unix like environment:

git clone https://github.com/kikitte/tisrv.git tisrv

# change working directory
cd tisrv

# preparing virtual env
python -m venv venv
source venv/bin/activate

# install dependencies
pip install -r requirements.txt

# start server, Note: before you starting the server, the configuration file may be edited.
uvicorn tisrv.main:app

The configuration file is tisrv.conf, and it should be placed in the root of working directory. Please check tisrv.conf for more detail about configuration.

Consume the service

Clients that flows the OGC API – Tiles should play well with this service, for example tileset endpoint can be used by openlayers, see OpenLayers - OGC Vector Tiles.

Implementation Details

Vector Tile:

• A geospatial data resource represents a spatial table in database.
• A dataset represents a scheme in database.

Benchmark/Comparing

fetch 64848 vector tile from pg_tileserv and tisrv:

siege --reps=once --no-parser -b -f tiles-l15.txt 

# pg_tileserv with gzip disabled (the default)
Transactions:                  64848 hits
Availability:                 100.00 %
Elapsed time:                  41.68 secs
Data transferred:             557.59 MB
Response time:                  0.02 secs
Transaction rate:            1555.85 trans/sec
Throughput:                    13.38 MB/sec
Concurrency:                   24.47
Successful transactions:       64848
Failed transactions:               0
Longest transaction:            0.08
Shortest transaction:           0.00
Shortest transaction:           0.00

# pg_tileserv with gzip disabled (self compiled to disable gzip)
Transactions:                  64848 hits
Availability:                 100.00 %
Elapsed time:                  36.50 secs
Data transferred:            1085.54 MB
Response time:                  0.01 secs
Transaction rate:            1776.66 trans/sec
Throughput:                    29.74 MB/sec
Concurrency:                   24.58
Successful transactions:       64848
Failed transactions:               0
Longest transaction:            0.06
Shortest transaction:           0.00

# tisrv with gzip disabled
Transactions:                  64848 hits
Availability:                 100.00 %
Elapsed time:                  70.53 secs
Data transferred:            1085.51 MB
Response time:                  0.03 secs
Transaction rate:             919.44 trans/sec
Throughput:                    15.39 MB/sec
Concurrency:                   24.77
Successful transactions:       64848
Failed transactions:               0
Longest transaction:            0.15
Shortest transaction:           0.00

# tisrv with gzip enabled
Transactions:                  64848 hits
Availability:                 100.00 %
Elapsed time:                 125.34 secs
Data transferred:             556.87 MB
Response time:                  0.05 secs
Transaction rate:             517.38 trans/sec
Throughput:                     4.44 MB/sec
Concurrency:                   24.77
Successful transactions:       64848
Failed transactions:               0
Longest transaction:            0.18
Shortest transaction:           0.00