GeoMesa

How can I download GeoMesa on Azure Databricks?

由 人盡茶涼 提交于 2020-01-25 00:20:07
问题 I am interested in performing Big Data Geospatial analysis on Apache Spark. My data is stored in Azure data lake, and I am restricted to use Azure Databricks. Is there anyway to download Geomesa on Databrick? Moreover, I would like to use the python api; what should I do? Any help is much appreciated!! 回答1: As a starting point, without knowing any more details, you should be able to use the GeoMesa filesystem data store against files stored in WASB. 回答2: You can install GeoMesa Library

Failed to connect to zookeeper within 2x zookeeper timeout period 30000

由 人盡茶涼 提交于 2020-01-16 16:20:41
问题 Failed to connect to zookeeper (10.10.10.205:2181) within 2x zookeeper timeout period 30000 I'm trying to run geomesa client on my local system. I've setup hadoop, accumulo and zookeeper in my virtual machine (whose ip is 10.10.10.205) I can see that my zookeeper is running. 2187 Jps 24929 NameNode 25610 Main 25729 Main 25203 SecondaryNameNode 25055 DataNode 30767 QuorumPeerMain But when I am trying to connect through client. I keep getting this error. java.lang.RuntimeException: Failed to

How to convert spark dataset to geomesa simplefeature and save it to cassandra (Could not find a SpatialRDDProvider)

由 谁说胖子不能爱 提交于 2019-12-25 19:56:21
问题 I have CSV files of geo data. I use apache spark to import those files into a DataSet and then I want to use GeoMesa. So I need to convert the dataset to simplefeature and in term to save it to Cassandra as GeoMesa format public class Main { public static void main(String[] args) throws IOException { Map<String, String> dsProperties = new HashMap<String, String>(); dsProperties.put("cassandra.keyspace", "t1"); dsProperties.put("cassandra.catalog", "testgeo"); dsProperties.put("cassandra

How are GeoTIFFs persisted in GeoMesa?

由 随声附和 提交于 2019-12-13 18:07:23
问题 How are GeoTIFFs saved in GeoMesa and Accumulo given that it is a key-value datastore? Moreover, which indices are added (if!) and on which fields? Likewise, for other formats such as: GeoJSON GML KML 回答1: GeoMesa's raster support is targeted a narrow set of use cases. The documentation for the raster support (http://www.geomesa.org/documentation/user/accumulo/raster.html) has some of the details for ingest and setting up GeoServer. Raster data does need to be in longitude/latitude (and maybe

Accumulo-monitor experiencing a Java RuntimeException when creating GeoMesa instance

由 前提是你 提交于 2019-12-11 05:28:53
问题 In order to setup a local GeoMesa-Accumulo stack, I've cloned a git repository (https://github.com/geodocker/geodocker-geomesa). Next, to create an instance, I executed the following commands. $ cd geodocker-geomesa/geodocker-accumulo-geomesa/ $ docker-compose up However, there seems to be a problem with the accumulo-monitor as I keep getting the following message. accumulo-monitor_1 | java.lang.RuntimeException: org.apache.accumulo.core.client.impl.ThriftScanner$ScanTimedOutException

How to retrieve raster data in GeoMesa with a single query given tempospatial search criteria

由 半世苍凉 提交于 2019-12-04 06:08:40
问题 According to How are GeoTIFFs persisted in GeoMesa? GeoMesa's raster data is indexed by spatial extent solely. Can I also save time info with the raster data? Else, for each raster I will have to persist another record holding its time info. Therefore, in order to retrieve my raster using a tempospatial query (is WMS capable for this? according to [1] it seems to be) I will have to retrieve both files; this means for x raster ==> x+1 GeoMesa hits (retrievals). [1] http://docs.geoserver.org

How to retrieve raster data in GeoMesa with a single query given tempospatial search criteria

由 [亡魂溺海] 提交于 2019-12-02 09:50:57
According to How are GeoTIFFs persisted in GeoMesa? GeoMesa's raster data is indexed by spatial extent solely. Can I also save time info with the raster data? Else, for each raster I will have to persist another record holding its time info. Therefore, in order to retrieve my raster using a tempospatial query (is WMS capable for this? according to [1] it seems to be) I will have to retrieve both files; this means for x raster ==> x+1 GeoMesa hits (retrievals). [1] http://docs.geoserver.org/stable/en/user/services/wms/time.html Currently, no, you cannot save time info with the raster data. WMS

数据可视化（四）开源 GIS 技术简史

由 左心房为你撑大大i 提交于 2019-11-27 16:00:49
原文: A History of Open Source GIS, from Humble Beginnings to World-Changing Applications | 23 Jun 2017 9:00am, by Anthony Calamito 数字制图和地理空间信息系统（Geographic Information System,GIS）的出现彻底改变了人们和对周围世界思考、互动的方式。将位置信息分层重叠用于决策的概念首先是由 Ian McHarg（景观设计师）在上世纪60年代提出。大约在同一时间，Roger Tomlinson —— 人们普遍称之为“GIS 之父”（Father of GIS） 完成了他的博士论文，主要研究使用计算方法处理分层的地理空间信息。罗杰随后致力于创建第一个计算机化的地理信息系统——加拿大地理信息系统（the Canada Geographic Information System），主要用于勘探测绘。 开源 GIS 的起源可以追溯到 1978 年的美国内政部（U.S. Department of the Interior）。从那时起，开源 GIS 基于不同的知识产权许可证，深入影响到许多行业的发展，包括政府和商业领域。美国劳工部称 GIS 技术为二十一世纪最重要的三大高增长产业之一。开源 GIS 技术在过去四十年的发展
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