1
vote
0answers
22 views

QGIS fTools very slow adding random points?

I am currently on windows 8.1 qgis 2.2 and almost everything I am trying to do using ftools is too slow. For example: using divaGIS world countries layer (.shp) when I try adding 500 random points ...
2
votes
1answer
46 views

ArcSDE performance and table changes on upgrade from 9.3 to 10.1?

I'm using ArcSDE 9.3 and SQL Server 2008 R2 and I want to migrate from ArcSDE 9.3 to ArcSDE 10.1. Is there any performance differences between ArcSDE 10.1 and ArcSDE 9.3 ? Is there any change ...
2
votes
2answers
55 views

What is the most efficient method to iterate geoprocessing operations through an attribute table?

I want to calculate the clipped raster layer percentage for a shapefile consist of overlapping polygons, since ArcGIS doesn't support tabulate area for overlapping features, so I used a loop to ...
1
vote
1answer
12 views

Compressing multiple static layers to single layer to make web map loading faster?

In our web application there are many layers to be loaded, this cause the loading of map very slow. I am seeking a way to compress multiple static layers to a single layer to make the loading ...
1
vote
0answers
21 views

Speeding up arcpy's TextElement.delete()

I'm making tables to go on data driven pages. For each page there are a series of tables that are produced. The elements of the tables are made using the clone method. The problem is that it takes ...
0
votes
1answer
52 views

How to automatically generate least-cost paths between several polygons?

What is the fastest way to automatically generate least-cost paths (LCPs) between several polygons with ArcGIS ? I created a python program to do this by using the functions "CostDistance" and ...
2
votes
0answers
67 views

Rendering performance

I am using ArcGis Java SDK for creating a map in my JavaFX application. I have a requirement to plot up to 500,000 graphics on graphics layer. When I do 100,000 graphics its performance is really bad. ...
2
votes
1answer
80 views

Cripplingly Slow Performance While Georeferencing in ArcMap 10.1

Just last night I started having an extremely frustrating problem with georeferencing, something that has been integral to my job for a few years now, and something I've never really had a problem ...
0
votes
0answers
31 views

Postgresql Postgis Query is taking long time

I have a table that included only 472 rows and geometry of table is Multipolygon. I am sending query to databse via PgAdmin III select * from mytable // this query takes 99413 ms this is vey long ...
3
votes
1answer
95 views

Benchmarking QGIS and ArcGIS for Desktop speed for “significant buffer on very large shapefiles”?

I am a newcomer to the world of GIS. I realized that QGIS was relatively similar to ArcGIS for Desktop. I would like to know if the two programs are comparable in terms of computational speed. For ...
1
vote
1answer
31 views

Does a high number of SDE_state_lineages slow performance?

In our SDE database, the SDE_state_lineages table has around 200,000 records, the SDE_states has around 900, and our SDE_versions table has around 1,300 records. We've been having performance issues ...
12
votes
2answers
311 views

How is the data access cursor performance so enhanced compared to previous versions?

The data access module was introduced with ArcGIS version 10.1. ESRI describes the data access module as follows (source): The data access module, arcpy.da, is a Python module for working with ...
2
votes
3answers
196 views

How can I work with very large shapefiles (~1 GB) in QGIS?

I'm performing some basic spatial analyses on a large database of traffic injuries in California between 2003 - 2011. Because the dataset is large (nearly 1 GB of points), I'd like to first cut it ...
2
votes
3answers
125 views

Iterating using search cursor and layer selection performance?

I'm trying to use the results of a search cursor to iteratively make selections on a feature class and then create new feature classes (so you get a new feature class or shp for each unique value in a ...
5
votes
2answers
111 views

Leaflet: How to enable pan & zoom while GeoJSON still rendering?

I've overlaid a huge GeoJSON geometry on top of my Leaflet map, covering about 20 countries' borderlines (about 1,5 million vertices) using "L.geoJson". Each time I zoom in/out, the computer has to ...
2
votes
2answers
104 views

Most reliable way to import large dataset with osm2psql

I know my question is similar to slow import via osm2pgsql to postgresql database and Optimizing osm2pgsql imports for OSM data but as we currently have quite some problems importing a large set of ...
1
vote
2answers
169 views

Creating tile packages (.tpk files) in ArcGIS for Desktop using multiple cores?

It takes hours or days to create tile package files on my workstation, which has 4 cores, 32G ram and a SSD drive. I noticed only one core is in active use while it is working. Is there a way to ...
1
vote
0answers
34 views

Improve Performance of Geoprocessing Service - GPServerSync.Load

I have a geoprocessing service in ArcGIS Server 10.1 that is a simple Print Task. The task is running as an Asynchronous service. It renders one MapService from the same ArcGIS Server instance, and ...
5
votes
2answers
157 views

Creating numpy.array with variable number of fields to test arcpy.da.ExtendTable performance?

There was an ArcPy Café blog posting entitled Adding Fields: Performance Tips which advocated: Two approaches to help increase performance when adding numerous fields to a table or feature ...
3
votes
1answer
174 views

How to find the distance to the nearest coastline from a land-based latitude/longitude point?

I'm completely new to GIS and unsure what I need to solve this problem: In the image above turquoise is actually land. Sea is white. I tried using the NASA Distance to the Nearest Coast data dump ...
1
vote
0answers
45 views

SDE Performance issue with SQL Spatial labelled lines on one server

Here is an issue that has stumped ESRI and SQL Server experts alike. I ask it here just to get more people thinking about it. Exhibit A is this screencast. I have two servers: ROGIS: A dedicated ...
1
vote
0answers
32 views

Performance Tuning on CartoDB

What kind of tuning can be done on your own cartodb instance to speed things up (outside of sql query optimization and indices)? Is there any documentation on this? If the records do not change, could ...
3
votes
1answer
163 views

Can ArcGIS Online navigate and identify large GIS datasets?

For my upcoming project, I want to see if ArcGIS Online can provide a viable solution. Users will need to have access to webmap on their desktops with basic navigation and identify. This will be an ...
1
vote
0answers
52 views

How to Buffer with Dissolve ALL on very large polyline dataset? [duplicate]

So I have a fairly large polyline network covering a decent chunk of North America, containing just shy of 900,000 table records. I want to do some very simple "GIS 101" kind of processing to it -- I ...
3
votes
0answers
144 views

ESRI geodatabase, Oracle spatial performance

We are storing data in a Geodatabase on Oracle 11g using Oracle Spatial with SDO_Geometry, and then consuming that using ArcGIS server 10.2.1. The performance is very slow, because we are talking ...
1
vote
1answer
67 views

Why a severe performance difference using deleteSearchedRows

The issue I am having involves two versioned tables. A function deletes 48 rows from Table A and and 48 rows from Table B using deleteSearchedRows. However, the delete from Table A takes roughly 4 ...
1
vote
0answers
56 views

Do ArcGIS clients that direct-connect to postgresql/postgis databases override configuration settings?

I went in to modify some settings on a Postgresql database via the PGAdmin config editor and some of the settings don't have their default values and they are higher because they've been overridden ...
1
vote
0answers
173 views

How to fix the possible memory leak issue in Openlayers 2.13.1 version?

Recently we have upgraded the Openlayers from version 2.12 to 2.13.1. However the performance of the new version is not that promising, infact it has degraded exponentially. I have a draggable model ...
4
votes
2answers
169 views

How to transfer attributes to thousands of local points from ArcSDE feature class with millions of polygons?

I have a set of points and a huge feature class with topographic information (OS MasterMap for who knows it). I'm talking millions of polygons huge. I want to transfer attributes of the polygons to ...
0
votes
1answer
42 views

Why can't I perform any operation over a 700MB MIF file containing 5 multipolygons? It takes forever

I'm trying to work with a MIF file containing 5 really big multipolygons, but every operation I try takes hours, or just crash because of memory issues. Mainly using ogr2ogr, to transform MIF file to ...
2
votes
2answers
114 views

Compacting ESRI file geodatabases…good practice?

Is there a way to quantify the effect of compacting your ESRI file geodatabase(s) on editing performance? I currently use ArcInfo(10.0). I have a 769 MB fgdb that holds my most used/edited datalayers ...
1
vote
0answers
20 views

Forcing Hash Join Query Plans using PostGIS

I'm currently testing PostGIS 2.0 in a Greenplum Appliance (Postgres 8.2 based) and have hit an incompatibility between PostGIS and the MPP Greenplum environment. The basic query below can't be ...
0
votes
1answer
93 views

JS/browser API library to show/interact with many markers with the best performance?

What's the best Javascript library that can show about 50000 (and more) clickable markers without resorting to things like clustering markers,etc? The markers are clickable and I want to associate ...
1
vote
2answers
102 views

spatial database vs spatial datastructure?

I am building an automated system that has to process several hundred spatial queries in the form of a polygon every day. The queries have to return both spatial and nonspatial data from different ...
1
vote
1answer
621 views

Which plugin can draw topoJson right within Leaflet without conversion?

I already have asked how to reduce file size and increase performance for publishing spatial data on the web using Leaflet, here. A conversion to TopoJSON has reduced the file size by approximately ...
3
votes
2answers
118 views

Fastest Way to Intersect Envelope with Multiple Feature Classes ArcObjects

I have the situation where I am doing a large number of intersections and I need to do them fast. The situation is I have a iMap with 1 or more layers and a series of envelopes, lots of envelopes. I ...
0
votes
0answers
32 views

Geoserver lock itself , performance problem

when 10-15 users use my wms layers, geoserver doesn't give response, or i hava tiledmap and when i zoom in and same level geoserver doesn't give any response so image is not appear. Is there any ...
2
votes
1answer
81 views

ArcMap lagging when I use the measure tool

ArcMap is lagging when I click the measure tool, my data isn't particularly big (biggest .shp is ~150mb) and my PC is brand new. Any idea what may be causing this?
0
votes
1answer
37 views

Debug/Improve Performance of GRASS v.in.ogr

I'm trying to import shapefiles (in this case, OpenStreetMap data) into GRASS (grass70-svn) using v.in.ogr; and it is painfully, brutally slow. At first I thought this was because I was using the ...
1
vote
0answers
141 views

Why is arcpy.mapping.ConvertWebMapToMapDocument slow?

We use arcpy.mapping for print tasks. The slowest part in workflow is arcpy.mapping function ConvertWebMapToMapDocument; it takes 10-12 seconds each time, doesn't matter if map is big or not. We use ...
3
votes
3answers
155 views

How to speed up redrawing of layers (from shapefiles) in MXD? [duplicate]

How do I speed up the process of redrawing layers in a MXD? I have already tried reloading and indexing the layers. The layers were created from shapefiles.
2
votes
1answer
348 views

Leaflet.geojson webpage performance out of hand, how to convert to .png?

I exported some countries as a single .geojson file. The file includes every country's vertices and coordinates, as that's what a .geojson is ─ a vector file. Thing is, there are about 20 countries ...
2
votes
1answer
111 views

How to refresh layers independently?

I'm writing a C++ application using QGIS API and I would like to improve the performance. I want to render 5 layers: one raster layer using gdal to load Bing/Google Map tiles 4 custom QgsMapLayer ...
2
votes
1answer
210 views

deploying geoserver on linux or windows: performance implications?

I am deploying my first geoserver in production. I develop on a Macbook Pro retina, and my client uses Windows, so I deploy on Windows servers. My first impression was that geoserver seemed a lot ...
1
vote
0answers
148 views

How to understand output of ArcGIS System Monitor?

We had some performance issues with our enterprise ArcGIS server application, in this regard I have installed ArcGIS System Monitor v1.0.9. After installing and configuring the site, they are several ...
0
votes
0answers
82 views

How to improve performance in ArcGIS Javascript API?

I created a webgis using ArcGIS Javascript API . I used dynamic map service layer with two layer in my map.I don't use 3D symbol and the symbology of layers are simple but when i run the project,I ...
0
votes
0answers
96 views

ArcMap: Append is really slow

I'm writing a Python script for ArcGIS 9.3.1 which is supposed to do the following: Create a new feature class in local FGDB Loop over a set of IDs (~40,000) Select features from an Oracle GDB with ...
1
vote
0answers
213 views

Feature Layer performance improvement

I have create a application where we show world map using arcgis .Here user does lot of interaction with map he click on the map or we highlight map programmatically so i want to improve performance ...
5
votes
1answer
135 views

PostGIS Optimization - Group spatially close entities physically on disk

I'm working on my first PostGIS database and was hoping to find some performance gains for live rendering. I'm rendering a map directly from a PostGIS (9.1, 2.0) db that contains an import of OSM ...
3
votes
2answers
305 views

How to Speed Up ArcGIS 10.1 for Desktop Generating Near Table on Polygon Feature Classes?

I am trying to create a near table to link two datasets. The first consists of the outlines of about 1.8 million buildings, the second a 3 meter buffer around these buildings, which as been merged ...