PostgreSQL’s general documentation is excellent, and very abundant, but
for QGis users (and perhaps ArcGis users) it’s hard to find a trivial document
explaining how to install Postgres and then Postgis , so as to have an operational
database in a few minutes. How to envisage the possibilities and functioning of the pair
Postgis / QGis without going through extensive training. Of course, once this
superficial trick is over, you will be able to tackle the reading of the
official documentation and learn how to manage or develop with Postgres.
This Article aims to:
By using the “Save / Open” panel you can save
and reopen dimensional models in the current document. To save the current
dimensional model, enter a name in the text box and click the “Save”
button . Be sure to save the document (.mxd) before closing ArcMap. Templates
are saved in the .mxd file . To re-open a saved dimensional model, simply
select it from the list.
The GetCapabilities operation is a request to a WFS server for a list of
operations and services, or capabilities, supported by that server. When you
establish a connection with QGis, for example, on a WFS server, QGis sends this
request to be able to manage the connection and offer you the uploading of the
different available layers.
A geoservice is a way to make geographic information available through
Today, almost all products allowing the setting and use of a geoservice
are based on the OGC standards. The Open Geospatial Consortium, or OGC, is an international
non-profit organization founded in 1994 to address issues of interoperability
of geographic information systems (GIS). The purpose of this consortium is to
bring together all the stakeholders concerned in the development and promotion
of the open standards guaranteeing interoperability in the field of geomatics and
geographic information and to foster cooperation between developers, suppliers
ArcGis reads straight through the Excel tables. You can add a table to
ArcMap, import a table into a geodatabase, or create a join or relationship
between an Arcgis layer and an Excel table. Yes but … If you do not know how
to pre-format your table, you open a Pandora’s box!
Here, in detail, all you need to know to work in peace and quiet.
One of the recurrent problems regarding the management of the geographical layers
from the differences between the layer entities, depending
on their origin . The
same layer produced by two different
sources will have slight digitalisation differences.
But the term “slight
” does not apply only to our
visual perception . In the case of our
software , two entities with some shifted points
, are as different as two entities
located at the antipodes.
The usual solution is to
take a layer as
and applying spatial analysis operators to recover
poorly the attributes of the other ” similar ” layers .
We have already discussed how to use
Acrobat Reader for geographic data visualization ( How
to createaGeographic PDF file with
ArcGis ). Since the new version of this
major changes , here is a new article devoted to the use of Adobe
Acrobat Reader DC.
When you create print composer output pdf, the vector layers are converted
in pdf by using all points present in the layer entities. If you use of bulky
layers, this results in large size pdf. In QGis version 2.12 you have a new
option that allows you to settle this problem .
Let’s consider as example the Geofla Commons layer. To appreciate the difference we will
not charge anything else . We open the print composer: