Remote Sensing


Satellite data has become one of the most used sources of geographic information about many areas of human activity over the past decade. Due to the rapid technological development in the field of Ground Observation, we have encountered a transition from research and military application to commercial use. Currently, there are virtually no restrictions in terms of availability and use of satellite data. The number of satellites acquiring image data for commercial purposes is in the tens and some new satellite systems will be launched in the near future. Thus, each user has the opportunity to choose the data that suits their needs.

The most striking improvement has occurred in spatial resolution. The latest satellites can obtain images with a resolution of better than 1m, suitable for mapping at a scale of 1:5,000 to 1:10,000. Even at this level of spatial detail, satellite data retains its rich spectral content; In multispectral mode images are always obtained in the infrared part of the optical spectrum as well. There are also special satellite systems that receive radar and hyperspectral data.

For satellite data acquisition, send your workspace to jeomodel@aol.com in one of the .shp-.kml-.kmz formats.
way you can send it. When sending workspace, “high”, “medium”, “low” resolution and usage
It will suffice to state your purpose. Our team is about the most suitable satellite data for your intended use.
will inform you.

The more frequent use of satellite data is due to their greater availability. In the past, the user had to rely on archives with data obtained without considering climatic conditions or customer needs. Today, commercial-based satellite systems enable the acquisition of images suitable for customer needs. It can define the data’s area of ​​interest, appropriate time interval and other parameters.

All data obtained is always archived. Therefore, the number of applications based on the analysis and evaluation of many environmental changes is increasing. Large archives and easy access to up-to-date images of almost every region in the world make satellite data an invaluable source of information and make the mapping tool accessible to everyone. The prices of satellite data have adapted to the competitive environment in the geographic data market and therefore become an effective alternative to traditional methods such as aerial photography or ground mapping.

Low and medium resolution satellite data are characterized by spatial resolution at about 1 km and hundreds of meters, respectively. These data are acquired only in multispectral mode, including the visible and infrared part of the optical spectrum. Thanks to the large area of ​​​​these satellites, daily or several-day frequency data is guaranteed.
The data are suitable for mapping at a scale of approximately 1:1,000,000.

Typical applications include:

Global and continental mapping
Monitoring of vegetation conditions
Crop modeling and crop yield estimation
Monitoring major disasters
Monitoring of snow cover and glaciers
Atmosphere and ocean viewing

High-resolution satellite data is described with a spatial resolution of about tens of meters. These data are usually acquired simultaneously in panchromatic and multispectral mode, with a significant share of spectral bands spanning the infrared optical spectrum. Some satellites only receive data over a regular, usually a few weeks period. Other more modern satellites can receive data at the request of the customer. In both cases, extensive data archives are available, containing all images acquired since the satellite’s launch.
The data is suitable for mapping or updating maps in the 1:100,000 – 1:25,000 scale range.

Common uses:
Regional mapping
regional planning
Urban development monitoring
Land cover/land use mapping and change assessment
vegetation monitoring
Mapping of agricultural areas and classification of agricultural products
Mapping of forest areas and classification of forest ecosystem
daily monitoring
geological mapping
geomorphological mapping
Disasters affect mapping
DEM production

Very high resolution satellite data is defined with a spatial resolution of about 1 m. These data can only be obtained in panchromatic mode, more often in a combination of panchromatic and multispectral mode. Today, it is the most progressive field of remote sensing. Most of these satellites carry the most modern systems with the ability and flexibility to receive data according to very concrete demands.
The data is suitable for mapping or updating maps in the 1:25,000 – 1:5,000 scale range.

Common uses include:
Detailed mapping
urban studies
3D city models
precision agriculture
Control of agricultural activities
Planning and design of linear infrastructures
Mapping of transport infrastructure
forest inventory
Mapping scattered vegetation
Monitoring of open pit mines, landfills and reprocessing activities
Soil erosion mapping
Planning and organization of humanitarian aid
insurance industry
DEM production

Radar data represents specific data obtained in the microwave portion of the electromagnetic spectrum. In this way, radar images can be obtained in any weather, day or night. Radar data with spatial resolution of tens of meters is currently available. In the very near future, 1m resolution will become a reality. Radar data conveniently complements conventional optical data, especially when climatic and meteorological conditions do not allow optical data to be acquired.

Typical applications are:
Flood and flood zones mapping
geomorphological mapping
Monitoring of seismological movements and landslides
Ship monitoring, detection of marine and ocean pollution
Mapping and monitoring of glaciers
Mapping and monitoring tropical forests
DEM production

1-Satellite Data Supply

Since its establishment in 2019, Jeomodel has been the sales representative of satellite data in Turkey. We provide consultancy assistance and full support to our customers and all interested parties. We assist in corporate and commercial matters related to the acquisition, processing and interpretation of satellite data.

Geomodel provides its customers with the following data:
WorldView-1, WorldView-2, QuickBird, GeoEye-1, Ikonos, Landsat7 ETM+, Landsat5 TM, Landsat MSS, ERS 1/2, JERS, ENVISAT ASAR & MERIS, TERRA ASTER & MODIS, ALOS, COSMO-SkyMed, Radarsat- 1, Radarsat-2, IRS P6, IRS-1C, IRS-1D
Astrium Services
Pleiades-HR-1, SPOT 1/2/4/5, SPOT Vegetation, FORMOSAT-2, KOMPSAT-2, TerraSAR-X, TerraSAR Tandem-X
IRS 1C, IRS 1D, IRS–P6, IRS AWiFS, Resourcesat-1, Cartosat-1, Cartosat-2
MDA Geospatial Services
Radarsat-1, Radarsat-2, EROS A/B
IKONOS, Orbview-2, Orbview-3, GeoEye-1
Astrium Services
TerraSAR-X, TerraSAR Tandem-X
EO-1 Hyperion and ALI
DMC International Imaging
DMC, NigeriaSAT-2
RESURS-0-1 (KFA-1000), RESURS-0-2 (MK-4), RESURS-0-3 (KFA-3000)

We can provide you with data from the above satellites covering any area on the Earth’s surface. If the demand area is not covered or the customer really needs up-to-date data, we can adjust the actual size programming of the selected satellite.

Our long-term collaborative experience with satellite operators around the world guarantees the optimum selection of data commensurate with the wishes and needs of our customers. We can also fulfill orders for unusual data that are not commercially available.

Data in its original form,  These “raw” data require further processing allowing their commercial use. If you don’t want to deal with the problem of data processing but have an idea of ​​what you need, we are happy to use our services.

In the next section, you can find the list of available satellite data and a brief overview of its use. They are clustered into three categories according to their spatial resolution. A separate section is devoted to satellites using radar data acquisition systems.

2- Data Processing

Jeomodel offers its customers a complete portfolio of raster data processing services. Regardless of whether any satellite or aerial images, paper or scanned maps or other geographic data needs to be processed, we have a solution to do this.

With our team’s long years of experience in this field, powerful and state-of-the-art hardware and software equipment, we are able to manage large projects with high quality, efficiency and on time.

In addition to the standard services we have developed for data processing chains developed specifically for specific customers, we are also our customers’ solution partner in the interpretation or development of unique geospatial or image products, for example in automation of large-volume data processing, thematic analysis and various geomatics applications.

Basic data processing
In this category we place various processing tasks. Often these are not very difficult steps, but if applied incorrectly or inappropriately they can significantly spoil the desired results or end products.

satellite data preprocessing
atmospheric correction, topographical correction, image scaling (8-bit, 16-bit, 32-bit), image enhancement, …

multispectral and panchromatic data fusion (different sensors, various image depths, preservation of spectral features), …

data reprojection
raster and vector data reprojection, database of verified European data, …

scanned maps, satellite and aerial data georeferencing, polynomial and Thin Plane Spline correction, …

Orthorectification and mosaicing
Orthorectification is the most accurate method for correcting weather and satellite data. Availability of accurate digital elevation model (DEM) and ground control points (GCPs) is an important prerequisite for obtaining satisfactory results.
Data orthorectification is one of the services our customers need most. We have managed several large and small domestic and international projects that orthorectify all kinds of satellite or aerial images. Our experience in this field and the use of state-of-the-art software tools ensure that the most accurate product is delivered according to customer requirements and the quality of reference data available.
Tessellation is often the next processing step when many satellite or aerial images take up a large area to be processed. Color-balanced product production is a frequently needed need. Again, this is a routine but also not trivial process that Jeomosdel has implemented in many projects.

Rigorous or Rational Functions (RPC) based orthorectification
HR & VHR satellite data, wide range of sensors, …

Block Packet Setting
Different satellite sensors in one block, implemented for both rigorous and RPC approach, to ensure good overall accuracy, …

Automation and batch processing
automatic image registration, automatic collection of GCPs and TPs, visual and command line scripting environment, …

Manual and automatic tessellation
image normalization, image “hot spot” removal, tessellation lines delivery, …

DEM and 3D data extraction
Geomodel offers a range of services in the field of DEM and 3D. These can be standalone applications or services combined with orthorectification tasks.

DEM production
stereophotogrammetry, radargrammetry, …

DEM processing
elevation point and vector data interpolation, SRTM DEM / ASTER GDEM processing, contour lines or TIN generation, …

DEM by-products
slope and incidence map, angles of incidence map, sight map, shaded relief, volumes and surfaces calculation

3D applications
terrain visualization, …

Data interpretation and analysis
Various image data utilization methods can be used to obtain thematic information from satellite or aerial images. We apply different approaches selected based on the data to be analyzed, the thematic information to be interpreted, and the evaluation of their pros and cons. Geomodel has developed various processing chains to deal with routine data interpretation tasks, methods specifically focused on multi-dated change detection and evaluation. Although Geomodel is new in the sector, it is at an important point with its experience, especially in extracting and interpreting geological information from the image. We have developed several methods to deal with data preparation, data processing, and data evaluation processes for a mineral exploration project, an oil exploration project, and a geographic project.