HiVision

Online Demo1

Online Demo2

Setting:

Tab1. Datasets: Roads, POI and Farmland of Mainland China (10-million-scale)

Name	Type	Records	Size
China_Mainland_Road	LineString	21,898,508	163,171,928 segments
China_Mainland_POI	Point	20,258,450	20,258,450 points
China_Mainland_Farmland	Polygon	10,520,644	133,830,561 edges

Tab2. Demo Environment

Item	Description
CPU	4core, Intel(R) Xeon(R) CPU E5-2680 v3@2.50GHz
Memory	32 GB
Operating System	Centos7

Application Scenarios:

The datasets (see Tab 1) used in the demonstration are provided by map service providers. As the datasets are not open published, the raw datasets are encrypted by adding offsets. The interface of the demonstration is simple to use, choose a dataset and click the Enter button, then the visualizing results will be added to the map in real time. Fig 1-4 show the visualizing results.

Fig1. China Mainland POI

Fig2. China Mainland roads

Fig3. China Mainland farmlands

Fig4. Patterns filling for polygon objects

Open Source

Software dependencies（tutorial for installing the software from source code）:

Redis (recommended version 3.2.12)

hiredis (recommended version 1.0.0)

MPICH (recommended version 3.3.2)

Boost C++ Libraries (recommended version 1.72)

Geospatial Data Abstraction Library (GDAL) >=2.0 (recommended version 2.4.4)

libpng (recommended version 1.2.59)

Compile:

All the source codes are included in HiVision_code. Run the following command to generate the executable programs:

cd HiVision_code # Go to source directory
mkdir build # Create a build directory
cd build # Move into build directory
cmake .. # Configure for your system
make # Generate the executable programs
cd .. # Move back to source directory

Run& Stop:

Edit the following parameters in "start.sh":

indexpath: path to store the spatial indexes (default : "./indexes/")

shppath: path of the input shapefiles (default : "./datasets/alaska_OSM/")

patternpath: path of the input patterns(default : "./patterns/")

process: MPI process count (default:4)

redishost: host IP of Redis (default:"127.0.0.1")

redisport: host Port of Redis (default:6379)

serviceport: port of the service (default:10080)

Then run the following scripts to start/stop HiVision automatically:

$ sh ./start.sh

$ sh ./stop.sh

Registration& Visualization Service:

Registration (Point: type=0/ LineString: type=1/ Polygon: type=2):

http://localhost:10080/HiVision/add/{shapefile_name}/{id}/{type}

Visualization WMTS:

http://localhost:10080/HiVision/{index_id}/{R}/{G}/{B}/{A}/{z}/{x}/{y}.png

Example:

(Point) datasets/alaska_OSM/gis_osm_places_free_1.shp 
http://localhost:10080/HiVision/add/gis_osm_places_free_1/places/0
http://localhost:10080/HiVision/pplaces/{R}/{G}/{B}/{A}/{z}/{x}/{y}.png
(LineString) datasets/alaska_OSM/gis_osm_roads_free_1.shp
http://localhost:10080/HiVision/add/gis_osm_roads_free_1/roads/1
http://localhost:10080/HiVision/lroads/{R}/{G}/{B}/{A}/{z}/{x}/{y}.png
(Polygon) datasets/alaska_OSM/gis_osm_buildings_a_free_1.shp 
http://localhost:10080/HiVision/add/gis_osm_buildings_a_free_1/buildings/2
http://localhost:10080/HiVision/abuildings/{R}/{G}/{B}/{A}/{z}/{x}/{y}.png

Citation

Ma M, Wu Y, Ouyang X, et al. HiVision: Rapid visualization of large-scale spatial vector data[J]. Computers & Geosciences, 2021, 147:104665.

Contact

Mengyu Ma@ National University of Defense Technology

Email: mamengyu10@nudt.edu.cn

Tel:+8615507487344