[postgis-users] Linear referencing capability
In a shapefile, especially routes, you can have user defined measures (m-values, usually in miles), they might not be same when you measure the two dimenstional line, from start to end vertices of any feature. These shapefiles would have begin and end post fields as attributes. It is not the case for any shapefiles with line types since two dimensional measures deviate from real distance from point a to point b. Moreover they would not be in miles. I was asking if I import a shapefile of polyline M into PostGIS would I be able to get measure in miles given a point or would I be able to get points given a measure in miles? Orelse there is different mechanism in PostGIS to the same job. If so how it is done. I know there are few methods to retrieve a mile point or a measure give a point in PostGIS. Doesn't this require calibrating the route, first, like I found out in this link (http://www.faunalia.com/lrs). Sorry for not being very clear in my previous question. I thought people might have confounded this situation and can easily understand it. Please let me know if still do not understand or help me if you can. Date: Tue, 21 Aug 2012 21:12:04 -0400 From: Paragon Corporation l...@pcorp.usmailto:l...@pcorp.us Subject: Re: [postgis-users] created linear referencing system To: 'PostGIS Users Discussion' postgis-users@postgis.refractions.netmailto:postgis-users@postgis.refractions.net Message-ID: 527D56A990434161A53D6CA92B3D9ED9@O Content-Type: text/plain; charset=us-ascii Muni, Not sure what you are asking and maybe others have a similar problem understanding. That might be why you haven't received an answer. What do you mean by linear reference capable? All spatial data that is of linestrings can be linearly referenced. Are you talking about a specific tool you are using? when you load your data from shape file to PostGIS, the data is still the same. If it had linestrings before, it should still have linestrings. _ From: postgis-users-boun...@postgis.refractions.netmailto:postgis-users-boun...@postgis.refractions.net [mailto:postgis-users-boun...@postgis.refractions.net] On Behalf Of Melpati, Muni Sent: Tuesday, August 21, 2012 4:07 PM To: postgis-users@postgis.refractions.netmailto:postgis-users@postgis.refractions.net Subject: [postgis-users] created linear referencing system Hi, I have asked this question before and could not get straight answer. I have a shape file which Linear reference capable. How to import such data? If I load the data using shape file loader, would the imported data is linear reference capable. If not how to recreate linear referencing system on imported data? ___ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users
[postgis-users] created linear referencing system
Hi, I have asked this question before and could not get straight answer. I have a shape file which Linear reference capable. How to import such data? If I load the data using shape file loader, would the imported data is linear reference capable. If not how to recreate linear referencing system on imported data? ___ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users
[postgis-users] Could not add all rasters to a table
Hi Park, I could not find gdalinfo.exe on my windows machine. I have installed postgis 2.0. Should I install gdalinfo separately? I could not google to the application download. Where should I find it? I could not find scale x/y values for the raster files. Moreover, I do not see any problem in viewing them in ArcMap. They might overlap little bit on the edges. But that is usually the case with raster images. Any help to sort of the problem. Thanks. Date: Tue, 14 Aug 2012 11:43:51 -0700 From: Bborie Park bkp...@ucdavis.edumailto:bkp...@ucdavis.edu Subject: Re: [postgis-users] Could not add all rasters to a table. To: postgis-users@postgis.refractions.netmailto:postgis-users@postgis.refractions.net Message-ID: 502a9c67.5040...@ucdavis.edumailto:502a9c67.5040...@ucdavis.edu Content-Type: text/plain; charset=ISO-8859-1 The error is just that: at least one raster isn't aligned with the other rasters being added to that table. One way to see what could be going on is to use gdalinfo on the four rasters. Check the values for the upper-left corner, scale and skew. The scale and skew should be the same while the upper-left corners should be divisible without a remainder... (rast1X - rast2X) / scaleX = whole number (rast1Y - rast2Y) / scaleY = whole number If all that looks good, post the outputs from gdalinfo for all four rasters so that I can take a look and see if there are strange floating point issues... -bborie On 08/14/2012 11:32 AM, Melpati, Muni wrote: Hi, I am getting this error raster with different alignment found in the set of rasters being converted to postgis raster while I load all four jpg files into a new table. When I view them ArcMap they just seems to align well. What must be going wrong? Here is the text in the bat file: path=%path%;E:\PostgreSQL\8.4\bin cd /D %~dp0 raster2pgsql -I -C -e -Y -F -s 26986 -t 300x300 -l 2,4 F:\PostGIS\raster\*.jpg private_schema.rasterly1 | psql -h localhost -U postgres -d gis_raster -p 5433 pause ___ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users
[postgis-users] Could not add all rasters to a table.
Hi, I am getting this error raster with different alignment found in the set of rasters being converted to postgis raster while I load all four jpg files into a new table. When I view them ArcMap they just seems to align well. What must be going wrong? Here is the text in the bat file: path=%path%;E:\PostgreSQL\8.4\bin cd /D %~dp0 raster2pgsql -I -C -e -Y -F -s 26986 -t 300x300 -l 2,4 F:\PostGIS\raster\*.jpg private_schema.rasterly1 | psql -h localhost -U postgres -d gis_raster -p 5433 pause ___ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users
[postgis-users] view raster data and query performance
I cannot answer for that. If anyone had this problem and fixed it, I would like to know how they have done it. Moreover, When I tries to store raster data outside the database, I could not even add the layer from QGIS. When I tried to add the layer using postgis plugin, I find raster layer related columns (pixel type, is extrernal file, pixel size x, pixel size y in the load potgis raster layer interface, has values none. I must have done something wrong. When I add this raster layer, QGIS crashes. Here is the syntax I have used: raster2pgsql -I -R -e -Y -F -s 26986 -t 128x128 c:\PostGIS\raster\dowell.jpg public.raster | psql -U postgres -d gisdb -h localhost -p 5432 Anything wrong with it. Thanks. Date: Mon, 30 Jul 2012 12:16:52 +0200 From: Paolo Cavallini cavall...@faunalia.itmailto:cavall...@faunalia.it Subject: Re: [postgis-users] view raster data and query performance To: postgis-users@postgis.refractions.netmailto:postgis-users@postgis.refractions.net Message-ID: 50165f14.6060...@faunalia.itmailto:50165f14.6060...@faunalia.it Content-Type: text/plain; charset=iso-8859-1 Il 27/07/2012 23:22, Melpati, Muni ha scritto: I have also changed postgresql.config file to improve the performance with no noticeble difference. Can anyone faced this problem or have any suggestion to improve the performance? Thanks in advance. Agreed, it is so slow to be barely usable in real world. I suppose this is due to the GDAL provider, right? All the best. -- Paolo Cavallini - Faunalia ___ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users
[postgis-users] view raster data and query performance
Hi, I am having some performance issues in querying data with arcgis and pgadmin itself. 1) If the vector data has many records like 60,000 records, arcgis, from remote machine, could not retrieve all the records of the vector data. If I select all feature it displays the attributes with a warning that it take long time to retrieve large data. It takes considerable time before being able to see all selected attributes. If switch selection, in this case no selection, again, I would not be able to see any records. I open task manager in the server machine and noticed, while I switch between select all to none feature, the cpu is shooting all the way upto 60%. 2) I have also imported raster data by splitting a raster file into 400 tiles. It is taking considerable time even to view all rows in pgadmin III. It is also considerably slow in view in QGIS, on the same machine, as well. What must be going wrong. I have also changed postgresql.config file to improve the performance with no noticeble difference. Can anyone faced this problem or have any suggestion to improve the performance? Thanks in advance. ___ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users
[postgis-users] Problem with using query layer in ArcGIS
Hi Simon,
Thank you for helping me on this. I have no issues with accessing the tables
from pgadmin III. Infact I loaded the data using Postgis shapefile loader
plugin. I could see, from pgadmin III, that gid is primary key. When I queried
data from ArcMap, I checked gid column as only unique identifier field. I did
not install ArcSDE on the machine. With regards to configuration. What
configuration files (ArcSDE sever config file) I need to look to make sure no
network issues are there? Cause the message, I get when I open the table of the
queried layer in ArcMap is
Could not load data from the data source. If you can correct the problem,
press the refresh button to reload data. Possible problems can include bad
network connection, invalid field, etc. The SQL statement was not a select
statement. The operation is not supported by this implementation.
Any suggestions you may have? Thanks in advance.
Regards,
Muni
Can you interact with the postgresql/Postgis data natively (ie via pgAminIII)
without error? Can't think of any case where this might not be the case. This
smells very much like an ArcGIS/ArcSDE configuration problem. In the old days,
when one used the ArcSDE administration command line tools, one would use
sdelayer to create a layer over an existing table. That sdelayer command
included arguments to tell ArcSDE what column contained the unique identifier
and whether it was SDE maintained or user maintained. ArcSDE, back then, didn't
require the column to be a primary key, only unique.
sdelayer -o add -l table,column -e entity_mask [-t storage_type]
[Spatial_Index][{-R SRID | [Spatial_Ref_Opts]}] [-M minimum_id] [{-f
init_features,avg_points | -k config_keyword}] [-E {empty |
xmin,ymin,xmax,ymax}] [-L {ON | OFF}] [-C
row_id_column[,{SDE|USER}[,min_ID]]] [-P {HIGH | BASIC}] [-S
layer_description_str] [-i {service | port# | direct connection}] [-s
server_name] [-D database_name] -u DB_user_name -p DB_user_password [-q]
For -C .
Specifies the name of the row ID column of the layer's business table and the
optional minimum row ID value
For the register operation, it also specifies whether the row ID is to be
registered as user or ArcSDE maintained. If ArcSDE maintained, you can specify
the starting value (min_ID) for the row ID. If no minimum ID is specified, it
defaults to 1. If you intend to register the feature class with the
geodatabase, you should register the row ID column as ArcSDE maintained.
For the feature_info operation, it specifies the name of the row ID column that
will be output to a table in the database.
Double check that this is your table/column configuration aligns with what I
have said.
regards
Simon
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[postgis-users] Problem with using query layer in ArcGIS 10
Hi William, Thank you for response. It is great that you showed interest in helping me on this. After playing with the query tool, it was very evident that I need to pick one single unique identifier field. The problem I am facing happens despite the fact that I selected one single field as unique identifier. I have two layers (one with 13,000 records and another with 55,600 records). Smaller file works like any other shape file. The larger file would through up loading data problem. Note: If I, either select a bunch features or use identify tool, I could see all the attributes. In other cases, though I could not see attributes, I could see all the features on the map. I could also use attribute query tool on the same data and select records and view them. However, I simply having trouble with opening the table and viewing all the records. Also I am unable to export to shapefile from ArcMap when this problem occurs. Thanks. Message: 5 Date: Mon, 02 Jul 2012 13:41:33 +0200 From: William Humphrey Temperley william.temper...@jrc.ec.europa.eumailto:william.temper...@jrc.ec.europa.eu Subject: Re: [postgis-users] Problem with using query layer in ArcGIS 10 To: 'PostGIS Users Discussion' postgis-users@postgis.refractions.netmailto:postgis-users@postgis.refractions.net Message-ID: 032201cd5847$a1790e40$e46b2ac0$@jrc.ec.europa.eumailto:032201cd5847$a1790e40$e46b2ac0$@jrc.ec.europa.eu Content-Type: text/plain; charset=us-ascii From: postgis-users-boun...@postgis.refractions.netmailto:postgis-users-boun...@postgis.refractions.net [mailto:postgis-users-boun...@postgis.refractions.net] On Behalf Of Melpati, Muni Sent: 28 June 2012 21:19 To: postgis-users@postgis.refractions.netmailto:postgis-users@postgis.refractions.net Subject: [postgis-users] Problem with using query layer in ArcGIS 10 Hi I was querying posgis layers from ArcGIS 10. I found that if add postgis layer with huge number of records, I am having trouble with accessing its attributes. When I try to open the table I get Could not load data from the data source. If you can correct the problem, press the refresh button to reload data. Possible problems can include bad network connection, invalid field, etc. The SQL statement was not a select statement. The operation is not supported by this implementation. I found similar problem somewhere in GIS forums where the user had to change the MAXBLOBSIZE value to -1 (unlimited) in the SDE SERVER CONFIG FILE. Is there similar fix to postgis/postgres? I appreciate your support. Thanks. By default ArcGIS uses all the fields in the query as the unique key. Tools such as identify labeling and the attribute table do not work when this is the case. To make them work the primary key of the data source should be used as the unique key. This also speeds up the loading of data. After writing a query, you need to click the Validate button and tick Show advanced options. The Next button will now be highlighted - click it. Uncheck all fields in the Unique identifier fields list except the correct primary key or unique field. The attribute table should now work if you provided a unique key. HTH, Will Temperley ___ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users
[postgis-users] Problem with using query layer in ArcGIS
The selected unique identifier column is GID (created by postgis). So, it has to be unique identifier. Based on the fact that I could see selected feature attributes or I could see attributes using identifier tool, I have to assume that query tool retrieves this information upon user action (in this case select a feature). That is why I am wondering if I need to modify something like it was done with SDE Server config file to improve the performance of the query application. Thanks. Message: 18 Date: Tue, 03 Jul 2012 17:50:55 +0200 From: William Humphrey Temperley william.temper...@jrc.ec.europa.eumailto:william.temper...@jrc.ec.europa.eu Subject: Re: [postgis-users] Problem with using query layer in ArcGIS 10 To: 'PostGIS Users Discussion' postgis-users@postgis.refractions.netmailto:postgis-users@postgis.refractions.net Message-ID: 013c01cd5933$a1af3230$e50d9690$@jrc.ec.europa.eumailto:013c01cd5933$a1af3230$e50d9690$@jrc.ec.europa.eu Content-Type: text/plain; charset=us-ascii I haven't seen this behaviour -- being able to see the attributes with identify but not being able to use the attribute table properly. Are you 100% certain the unique identifier column you have chosen is unique, i.e. is it a primary key, or does it have a unique constraint on it? Duplicate keys might cause this behaviour, but I'm not sure. Will From: postgis-users-boun...@postgis.refractions.netmailto:postgis-users-boun...@postgis.refractions.net [mailto:postgis-users-boun...@postgis.refractions.net] On Behalf Of Melpati, Muni Sent: 03 July 2012 17:28 To: postgis-users@postgis.refractions.netmailto:postgis-users@postgis.refractions.net Subject: [postgis-users] Problem with using query layer in ArcGIS 10 Hi William, Thank you for response. It is great that you showed interest in helping me on this. After playing with the query tool, it was very evident that I need to pick one single unique identifier field. The problem I am facing happens despite the fact that I selected one single field as unique identifier. I have two layers (one with 13,000 records and another with 55,600 records). Smaller file works like any other shape file. The larger file would through up loading data problem. Note: If I, either select a bunch features or use identify tool, I could see all the attributes. In other cases, though I could not see attributes, I could see all the features on the map. I could also use attribute query tool on the same data and select records and view them. However, I simply having trouble with opening the table and viewing all the records. Also I am unable to export to shapefile from ArcMap when this problem occurs. Thanks. ___ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users
[postgis-users] Unable to add the postgis 2.0 shapefile loader plug-in to postgres 8.4.12
Hi, I have installed postgis 2.0 over Postgres 8.4.12. However, I could not see the postgis shapefile loader plugin in the pgadmin III plugins. However, I can see it from the start menu. I checked the plugins.ini. It is consistent with what described at http://www.postgresonline.com/journal/archives/145-PgAdmin-III-Plug-in-Registration-PostGIS-Shapefile-and-DBF-Loader.html. For my installation postgisgui\shp2pgsql-gui.exe is actually located at D:\PostgreSQL\8.4\bin and PG bin path is rightfully specified at D:\PostgreSQL\8.4\bin. Is there anything that would have gone wrong? Thanks. ___ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users
Re: [postgis-users] Unable to add the postgis 2.0 shapefile loader plug-in to postgres 8.4.12
Problem solved. I was only looking at plugins in wrong location. Thanks. From: Melpati, Muni Sent: Thursday, June 28, 2012 11:06 AM To: 'postgis-users@postgis.refractions.net' Subject: Unable to add the postgis 2.0 shapefile loader plug-in to postgres 8.4.12 Hi, I have installed postgis 2.0 over Postgres 8.4.12. However, I could not see the postgis shapefile loader plugin in the pgadmin III plugins. However, I can see it from the start menu. I checked the plugins.ini. It is consistent with what described at http://www.postgresonline.com/journal/archives/145-PgAdmin-III-Plug-in-Registration-PostGIS-Shapefile-and-DBF-Loader.html. For my installation postgisgui\shp2pgsql-gui.exe is actually located at D:\PostgreSQL\8.4\bin and PG bin path is rightfully specified at D:\PostgreSQL\8.4\bin. Is there anything that would have gone wrong? Thanks. ___ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users
[postgis-users] Unable to add the postgis 2.0 shapefile loader plug-in to postgres 8.4.12
This problem is solved. I was looking at wrong plugins.ini file. Thanks. ___ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users
[postgis-users] Problem with using query layer in ArcGIS 10
Hi I was querying posgis layers from ArcGIS 10. I found that if add postgis layer with huge number of records, I am having trouble with accessing its attributes. When I try to open the table I get Could not load data from the data source. If you can correct the problem, press the refresh button to reload data. Possible problems can include bad network connection, invalid field, etc. The SQL statement was not a select statement. The operation is not supported by this implementation. I found similar problem somewhere in GIS forums where the user had to change the MAXBLOBSIZE value to -1 (unlimited) in the SDE SERVER CONFIG FILE. Is there similar fix to postgis/postgres? I appreciate your support. Thanks. ___ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users
[postgis-users] Linear referencing with PostGIS
We have various web-based GIS applications that consume the data from enterprise database (oracle/ArcSDE) . These applications need linear referencing capabilities of the ArcSDE. We currently do this using java API provided by ESRI. Some of these web application provide user capabilities to query distance, in miles, of a road segment give a location on the road. Our data has linear referencing capabilities and other features such as topology which are essential to our business needs. I came to know while older PostGIS doesn't provide such capabilities. I am wondering if newer versions offer any similar functionalities. Is it possible to provide similar capabilities with PostGIS and Postgresql? Thanks in advance. ___ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users
Re: [postgis-users] One-click installer or building from the source code (postgresql)
Can someone atleast provide references to previous studies with regards to using a combination of postgresql, PostGIS and ArcSDE products for maintaining GIS and raster data. Thanks in advance. ___ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users
[postgis-users] One-click installer or building from the source code (postgresql)
Hi, I am new postgresql and PostGIS. We are conducting feasibility study of using Postgresql and postGIS and/or SDE. Our business requires using raster data and Esri and postgis geodatabase. Currently, we are using ArcSDE over Oracle to store raster data and vector data. We also have web applications that consume data from the ArcSDE. As part of feasibility study I would like to know the difference between using one-click installer and building from the source code for postgresql installation. I learnt that building from the source code is for user who are interested in building postgresql. I am under impression that we are only going to use postgresql is for mainting geodatabase. Most likely we would be using ArcSDE over postGIS and Postgressql as it offers flexibility. Do you think having the ability to build postgresql would help in maintaining geodatabase in Postgresql? What is the best method of installing Postgresql? Also Can you share if you have documentation of previous studies on using this combination of these software products? Your information is greatly appreciated. Thanks. ___ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users
